20112631 has 16 divisors (see below), whose sum is σ = 25943040. Its totient is φ = 15130080.

The previous prime is 20112629. The next prime is 20112637. The reversal of 20112631 is 13621102.

It is not a de Polignac number, because 20112631 - 2¹ = 20112629 is a prime.

It is a super-2 number, since 2×20112631² = 809035851484322, 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 (20112637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2271 + ... + 6736.

It is an arithmetic number, because the mean of its divisors is an integer number (1621440).

Almost surely, 2^20112631 is an apocalyptic number.

20112631 is a deficient number, since it is larger than the sum of its proper divisors (5830409).

20112631 is a wasteful number, since it uses less digits than its factorization.

20112631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9054.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20112631 is about 4484.7108045001. The cubic root of 20112631 is about 271.9503540807.

Adding to 20112631 its reverse (13621102), we get a palindrome (33733733).

The spelling of 20112631 in words is "twenty million, one hundred twelve thousand, six hundred thirty-one".