20458868 has 12 divisors (see below), whose sum is σ = 37359840. Its totient is φ = 9784632.

The previous prime is 20458859. The next prime is 20458873. The reversal of 20458868 is 86885402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111098 + ... + 111281.

It is an arithmetic number, because the mean of its divisors is an integer number (3113320).

Almost surely, 2^20458868 is an apocalyptic number.

It is an amenable number.

20458868 is a deficient number, since it is larger than the sum of its proper divisors (16900972).

20458868 is a wasteful number, since it uses less digits than its factorization.

20458868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222406 (or 222404 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 20458868 is about 4523.1480188028. The cubic root of 20458868 is about 273.5020169699.

The spelling of 20458868 in words is "twenty million, four hundred fifty-eight thousand, eight hundred sixty-eight".