20931327315 has 32 divisors (see below), whose sum is σ = 37221350400. Its totient is φ = 11160344160.

The previous prime is 20931327271. The next prime is 20931327331. The reversal of 20931327315 is 51372313902.

It is a happy number.

20931327315 is a `hidden beast` number, since 2 + 0 + 9 + 313 + 27 + 315 = 666.

It is not a de Polignac number, because 20931327315 - 2⁸ = 20931327059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20931327315.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531660 + ... + 569670.

It is an arithmetic number, because the mean of its divisors is an integer number (1163167200).

Almost surely, 2^20931327315 is an apocalyptic number.

20931327315 is a deficient number, since it is larger than the sum of its proper divisors (16290023085).

20931327315 is a wasteful number, since it uses less digits than its factorization.

20931327315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42104 (or 42098 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The spelling of 20931327315 in words is "twenty billion, nine hundred thirty-one million, three hundred twenty-seven thousand, three hundred fifteen".