20264631 has 4 divisors (see below), whose sum is σ = 27019512. Its totient is φ = 13509752.

The previous prime is 20264609. The next prime is 20264689. The reversal of 20264631 is 13646202.

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 20264631 - 2⁵ = 20264599 is a prime.

It is a super-2 number, since 2×20264631² = 821310539132322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263631) 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, 3377436 + ... + 3377441.

It is an arithmetic number, because the mean of its divisors is an integer number (6754878).

Almost surely, 2^20264631 is an apocalyptic number.

20264631 is a deficient number, since it is larger than the sum of its proper divisors (6754881).

20264631 is an equidigital number, since it uses as much as digits as its factorization.

20264631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6754880.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20264631 is about 4501.6253731291. The cubic root of 20264631 is about 272.6337182852.

The spelling of 20264631 in words is "twenty million, two hundred sixty-four thousand, six hundred thirty-one".