204015120 has 40 divisors (see below), whose sum is σ = 632447616. Its totient is φ = 54403968.

The previous prime is 204015107. The next prime is 204015131. The reversal of 204015120 is 21510402.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×204015120² = 83244338377228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 204015120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424792 + ... + 425271.

Almost surely, 2^204015120 is an apocalyptic number.

204015120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204015120 is an abundant number, since it is smaller than the sum of its proper divisors (428432496).

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

204015120 is a wasteful number, since it uses less digits than its factorization.

204015120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850079 (or 850073 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 204015120 is about 14283.3861531501. The cubic root of 204015120 is about 588.6910751022.

Adding to 204015120 its reverse (21510402), we get a palindrome (225525522).

The spelling of 204015120 in words is "two hundred four million, fifteen thousand, one hundred twenty".