20268831 has 12 divisors (see below), whose sum is σ = 29705816. Its totient is φ = 12283920.

The previous prime is 20268827. The next prime is 20268851. The reversal of 20268831 is 13886202.

It is not a de Polignac number, because 20268831 - 2² = 20268827 is a prime.

It is a super-2 number, since 2×20268831² = 821651020213122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20268851) 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, 27556 + ... + 28281.

Almost surely, 2^20268831 is an apocalyptic number.

20268831 is a deficient number, since it is larger than the sum of its proper divisors (9436985).

20268831 is a wasteful number, since it uses less digits than its factorization.

20268831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55862 (or 55851 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20268831 is about 4502.0918471306. The cubic root of 20268831 is about 272.6525521262.

The spelling of 20268831 in words is "twenty million, two hundred sixty-eight thousand, eight hundred thirty-one".