20868600 has 48 divisors (see below), whose sum is σ = 64694520. Its totient is φ = 5564800.

The previous prime is 20868581. The next prime is 20868619. The reversal of 20868600 is 686802.

It is an interprime number because it is at equal distance from previous prime (20868581) and next prime (20868619).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16791 + ... + 17990.

Almost surely, 2^20868600 is an apocalyptic number.

20868600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20868600 is an abundant number, since it is smaller than the sum of its proper divisors (43825920).

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

20868600 is a wasteful number, since it uses less digits than its factorization.

20868600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34800 (or 34791 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20868600 is about 4568.2162820952. The cubic root of 20868600 is about 275.3157805034.

The spelling of 20868600 in words is "twenty million, eight hundred sixty-eight thousand, six hundred".