20239868 has 24 divisors (see below), whose sum is σ = 38800944. Its totient is φ = 9161600.

The previous prime is 20239859. The next prime is 20239897. The reversal of 20239868 is 86893202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11546 + ... + 13182.

It is an arithmetic number, because the mean of its divisors is an integer number (1616706).

Almost surely, 2^20239868 is an apocalyptic number.

It is an amenable number.

20239868 is a deficient number, since it is larger than the sum of its proper divisors (18561076).

20239868 is a wasteful number, since it uses less digits than its factorization.

20239868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933 (or 1931 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 20239868 is about 4498.8740813675. The cubic root of 20239868 is about 272.5226219191.

The spelling of 20239868 in words is "twenty million, two hundred thirty-nine thousand, eight hundred sixty-eight".