20331892 has 12 divisors (see below), whose sum is σ = 40663840. Its totient is φ = 8713656.

The previous prime is 20331889. The next prime is 20331893. The reversal of 20331892 is 29813302.

20331892 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 726139 = 20331892 / (2 + 0 + 3 + 3 + 1 + 8 + 9 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 20331892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331893) 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, 363042 + ... + 363097.

Almost surely, 2^20331892 is an apocalyptic number.

It is an amenable number.

20331892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20331892 is a wasteful number, since it uses less digits than its factorization.

20331892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726150 (or 726148 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20331892 is about 4509.0899303518. The cubic root of 20331892 is about 272.9350210085.

The spelling of 20331892 in words is "twenty million, three hundred thirty-one thousand, eight hundred ninety-two".