20431971160 has 64 divisors (see below), whose sum is σ = 48188558880. Its totient is φ = 7787996160.

The previous prime is 20431971143. The next prime is 20431971173. The reversal of 20431971160 is 6117913402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74347 + ... + 215386.

Almost surely, 2^20431971160 is an apocalyptic number.

20431971160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431971160 is an abundant number, since it is smaller than the sum of its proper divisors (27756587720).

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

20431971160 is a wasteful number, since it uses less digits than its factorization.

20431971160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289828 (or 289824 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 20431971160 in words is "twenty billion, four hundred thirty-one million, nine hundred seventy-one thousand, one hundred sixty".