Search a number
-
+
20010100 = 22521118191
BaseRepresentation
bin100110001010…
…1010001110100
31101122121200211
41030111101310
520110310400
61552515204
7332040325
oct114252164
941577624
1020010100
1110327980
12684bb04
1341b7bc6
14292c44c
151b53dba
hex1315474

20010100 has 36 divisors (see below), whose sum is σ = 47371968. Its totient is φ = 7276000.

The previous prime is 20010079. The next prime is 20010127. The reversal of 20010100 is 101002.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a self number, because there is not a number n which added to its sum of digits gives 20010100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7996 + ... + 10195.

It is an arithmetic number, because the mean of its divisors is an integer number (1315888).

Almost surely, 220010100 is an apocalyptic number.

20010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010100 is an abundant number, since it is smaller than the sum of its proper divisors (27361868).

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

20010100 is a wasteful number, since it uses less digits than its factorization.

20010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18216 (or 18209 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 20010100 is about 4473.2650268009. The cubic root of 20010100 is about 271.4874466666.

Adding to 20010100 its reverse (101002), we get a palindrome (20111102).

The spelling of 20010100 in words is "twenty million, ten thousand, one hundred".

Divisors: 1 2 4 5 10 11 20 22 25 44 50 55 100 110 220 275 550 1100 18191 36382 72764 90955 181910 200101 363820 400202 454775 800404 909550 1000505 1819100 2001010 4002020 5002525 10005050 20010100