Search a number
-
+
20630050120 = 2351780937501
BaseRepresentation
bin10011001101101001…
…011001010101001000
31222020202002010112101
4103031221121111020
5314222243100440
613251033323144
71330142350501
oct231551312510
958222063471
1020630050120
118827141aa9
123bb8b664b4
131c3a095264
14dd9c51ba8
1580b22269a
hex4cda59548

20630050120 has 64 divisors (see below), whose sum is σ = 49210124400. Its totient is φ = 7756800000.

The previous prime is 20630050093. The next prime is 20630050127. The reversal of 20630050120 is 2105003602.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 14913782884 + 5716267236 = 122122^2 + 75606^2 .

It is not an unprimeable number, because it can be changed into a prime (20630050127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531370 + ... + 568870.

Almost surely, 220630050120 is an apocalyptic number.

20630050120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20630050120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24605062200).

20630050120 is an abundant number, since it is smaller than the sum of its proper divisors (28580074280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20630050120 is a wasteful number, since it uses less digits than its factorization.

20630050120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38338 (or 38334 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 20630050120 its reverse (2105003602), we get a palindrome (22735053722).

The spelling of 20630050120 in words is "twenty billion, six hundred thirty million, fifty thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680 809 1618 3236 4045 6472 8090 13753 16180 27506 32360 37501 55012 68765 75002 110024 137530 150004 187505 275060 300008 375010 550120 637517 750020 1275034 1500040 2550068 3187585 5100136 6375170 12750340 25500680 30338309 60676618 121353236 151691545 242706472 303383090 515751253 606766180 1031502506 1213532360 2063005012 2578756265 4126010024 5157512530 10315025060 20630050120