204402644634 has 16 divisors (see below), whose sum is σ = 409485504960. Its totient is φ = 68020845600.

The previous prime is 204402644629. The next prime is 204402644683. The reversal of 204402644634 is 436446204402.

It is a super-2 number, since 2×204402644634² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204402644592 and 204402644601.

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, 28338414 + ... + 28345625.

It is an arithmetic number, because the mean of its divisors is an integer number (25592844060).

Almost surely, 2^204402644634 is an apocalyptic number.

204402644634 is an abundant number, since it is smaller than the sum of its proper divisors (205082860326).

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

204402644634 is a wasteful number, since it uses less digits than its factorization.

204402644634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56684645.

The product of its (nonzero) digits is 442368, while the sum is 39.

The spelling of 204402644634 in words is "two hundred four billion, four hundred two million, six hundred forty-four thousand, six hundred thirty-four".