20431169944 has 16 divisors (see below), whose sum is σ = 38957740200. Its totient is φ = 10042439232.

The previous prime is 20431169939. The next prime is 20431169953. The reversal of 20431169944 is 44996113402.

It is a self number, because there is not a number n which added to its sum of digits gives 20431169944.

It is a congruent number.

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, 21642717 + ... + 21643660.

Almost surely, 2^20431169944 is an apocalyptic number.

It is an amenable number.

20431169944 is a deficient number, since it is larger than the sum of its proper divisors (18526570256).

20431169944 is a wasteful number, since it uses less digits than its factorization.

20431169944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43286442 (or 43286438 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 20431169944 in words is "twenty billion, four hundred thirty-one million, one hundred sixty-nine thousand, nine hundred forty-four".