Search a number
-
+
20033280 = 283253747
BaseRepresentation
bin100110001101…
…0111100000000
31101200210111100
41030122330000
520112031110
61553214400
7332165031
oct114327400
941623440
1020033280
1110343333
126861400
1341c5617
142936a88
151b5abc0
hex131af00

20033280 has 216 divisors, whose sum is σ = 72700992. Its totient is φ = 5087232.

The previous prime is 20033263. The next prime is 20033309. The reversal of 20033280 is 8233002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426217 + ... + 426263.

Almost surely, 220033280 is an apocalyptic number.

20033280 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 20033280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36350496).

20033280 is an abundant number, since it is smaller than the sum of its proper divisors (52667712).

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

20033280 is a wasteful number, since it uses less digits than its factorization.

20033280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20033280 is about 4475.8552255407. The cubic root of 20033280 is about 271.5922379233.

Adding to 20033280 its reverse (8233002), we get a palindrome (28266282).

The spelling of 20033280 in words is "twenty million, thirty-three thousand, two hundred eighty".