20056631 has 12 divisors (see below), whose sum is σ = 23774472. Its totient is φ = 16864848.

The previous prime is 20056607. The next prime is 20056669. The reversal of 20056631 is 13665002.

It is a de Polignac number, because none of the positive numbers 2^k-20056631 is a prime.

It is a super-2 number, since 2×20056631² = 804536894140322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20056597 and 20056606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1265 + ... + 6458.

It is an arithmetic number, because the mean of its divisors is an integer number (1981206).

Almost surely, 2^20056631 is an apocalyptic number.

20056631 is a deficient number, since it is larger than the sum of its proper divisors (3717841).

20056631 is an equidigital number, since it uses as much as digits as its factorization.

20056631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7790 (or 7783 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20056631 is about 4478.4630175988. The cubic root of 20056631 is about 271.6977205313.

The spelling of 20056631 in words is "twenty million, fifty-six thousand, six hundred thirty-one".