204002044040 has 16 divisors (see below), whose sum is σ = 459004599180. Its totient is φ = 81600817600.

The previous prime is 204002044027. The next prime is 204002044067. The reversal of 204002044040 is 40440200402.

It can be written as a sum of positive squares in 2 ways, for example, as 203146715524 + 855328516 = 450718^2 + 29246^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550025511 + ... + 2550025590.

Almost surely, 2^204002044040 is an apocalyptic number.

204002044040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204002044040 is an abundant number, since it is smaller than the sum of its proper divisors (255002555140).

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

204002044040 is a wasteful number, since it uses less digits than its factorization.

204002044040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100051112 (or 5100051108 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 204002044040 its reverse (40440200402), we get a palindrome (244442244442).

The spelling of 204002044040 in words is "two hundred four billion, two million, forty-four thousand, forty".