20431431330604 has 72 divisors (see below), whose sum is σ = 42145031765760. Its totient is φ = 8485340086944.

The previous prime is 20431431330593. The next prime is 20431431330619. The reversal of 20431431330604 is 40603313413402.

It is a self number, because there is not a number n which added to its sum of digits gives 20431431330604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18893257 + ... + 19945375.

Almost surely, 2^{20431431330604} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20431431330604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21072515882880).

20431431330604 is an abundant number, since it is smaller than the sum of its proper divisors (21713600435156).

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

20431431330604 is a wasteful number, since it uses less digits than its factorization.

20431431330604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052427 (or 1052298 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 34.

The spelling of 20431431330604 in words is "twenty trillion, four hundred thirty-one billion, four hundred thirty-one million, three hundred thirty thousand, six hundred four".