20431317364 has 24 divisors (see below), whose sum is σ = 35995989960. Its totient is φ = 10146914304.

The previous prime is 20431317359. The next prime is 20431317419. The reversal of 20431317364 is 46371313402.

It can be written as a sum of positive squares in 4 ways, for example, as 3018403600 + 17412913764 = 54940^2 + 131958^2 .

It is a congruent number.

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, 483852 + ... + 524380.

It is an arithmetic number, because the mean of its divisors is an integer number (1499832915).

Almost surely, 2^20431317364 is an apocalyptic number.

It is an amenable number.

20431317364 is a deficient number, since it is larger than the sum of its proper divisors (15564672596).

20431317364 is a wasteful number, since it uses less digits than its factorization.

20431317364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41379 (or 41377 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The spelling of 20431317364 in words is "twenty billion, four hundred thirty-one million, three hundred seventeen thousand, three hundred sixty-four".