204254639720 has 32 divisors (see below), whose sum is σ = 459704898720. Its totient is φ = 81678396480.

The previous prime is 204254639711. The next prime is 204254639741. The reversal of 204254639720 is 27936452402.

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, 591722 + ... + 871001.

It is an arithmetic number, because the mean of its divisors is an integer number (14365778085).

Almost surely, 2^204254639720 is an apocalyptic number.

204254639720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204254639720 is an abundant number, since it is smaller than the sum of its proper divisors (255450259000).

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

204254639720 is a wasteful number, since it uses less digits than its factorization.

204254639720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466225 (or 1466221 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 204254639720 in words is "two hundred four billion, two hundred fifty-four million, six hundred thirty-nine thousand, seven hundred twenty".