20331868 has 6 divisors (see below), whose sum is σ = 35580776. Its totient is φ = 10165932.

The previous prime is 20331853. The next prime is 20331889. The reversal of 20331868 is 86813302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2541480 + ... + 2541487.

Almost surely, 2^20331868 is an apocalyptic number.

It is an amenable number.

20331868 is a deficient number, since it is larger than the sum of its proper divisors (15248908).

20331868 is a wasteful number, since it uses less digits than its factorization.

20331868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082971 (or 5082969 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20331868 is about 4509.0872690601. The cubic root of 20331868 is about 272.9349136166.

The spelling of 20331868 in words is "twenty million, three hundred thirty-one thousand, eight hundred sixty-eight".