20312700 has 36 divisors (see below), whose sum is σ = 58772280. Its totient is φ = 5416640.

The previous prime is 20312693. The next prime is 20312713. The reversal of 20312700 is 721302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20312700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33555 + ... + 34154.

Almost surely, 2^20312700 is an apocalyptic number.

20312700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312700 is an abundant number, since it is smaller than the sum of its proper divisors (38459580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20312700 is a wasteful number, since it uses less digits than its factorization.

20312700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67726 (or 67719 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 20312700 is about 4506.9612822832. The cubic root of 20312700 is about 272.8491162642.

It can be divided in two parts, 20312 and 700, that added together give a palindrome (21012).

The spelling of 20312700 in words is "twenty million, three hundred twelve thousand, seven hundred".