20327931 has 12 divisors (see below), whose sum is σ = 31621408. Its totient is φ = 12509424.

The previous prime is 20327917. The next prime is 20327947. The reversal of 20327931 is 13972302.

It is not a de Polignac number, because 20327931 - 2⁵ = 20327899 is a prime.

It is a super-2 number, since 2×20327931² = 826449557481522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20327895 and 20327904.

It is not an unprimeable number, because it can be changed into a prime (20337931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86755 + ... + 86988.

Almost surely, 2^20327931 is an apocalyptic number.

20327931 is a deficient number, since it is larger than the sum of its proper divisors (11293477).

20327931 is a wasteful number, since it uses less digits than its factorization.

20327931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173762 (or 173759 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20327931 is about 4508.6506850720. The cubic root of 20327931 is about 272.9172957221.

The spelling of 20327931 in words is "twenty million, three hundred twenty-seven thousand, nine hundred thirty-one".