20882931 has 4 divisors (see below), whose sum is σ = 27843912. Its totient is φ = 13921952.

The previous prime is 20882921. The next prime is 20882959. The reversal of 20882931 is 13928802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20882931 - 2¹¹ = 20880883 is a prime.

It is a super-2 number, since 2×20882931² = 872193614301522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20882892 and 20882901.

It is not an unprimeable number, because it can be changed into a prime (20882921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3480486 + ... + 3480491.

It is an arithmetic number, because the mean of its divisors is an integer number (6960978).

Almost surely, 2^20882931 is an apocalyptic number.

20882931 is a deficient number, since it is larger than the sum of its proper divisors (6960981).

20882931 is an equidigital number, since it uses as much as digits as its factorization.

20882931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960980.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20882931 is about 4569.7845682264. The cubic root of 20882931 is about 275.3787882060.

The spelling of 20882931 in words is "twenty million, eight hundred eighty-two thousand, nine hundred thirty-one".