20655868 has 12 divisors (see below), whose sum is σ = 36190000. Its totient is φ = 10315872.

The previous prime is 20655857. The next prime is 20655871. The reversal of 20655868 is 86855602.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20655868.

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, 1633 + ... + 6631.

Almost surely, 2^20655868 is an apocalyptic number.

It is an amenable number.

20655868 is a deficient number, since it is larger than the sum of its proper divisors (15534132).

20655868 is a wasteful number, since it uses less digits than its factorization.

20655868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6036 (or 6034 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 20655868 is about 4544.8727154894. The cubic root of 20655868 is about 274.3770715541.

The spelling of 20655868 in words is "twenty million, six hundred fifty-five thousand, eight hundred sixty-eight".