20868877 has 16 divisors (see below), whose sum is σ = 22982400. Its totient is φ = 18869760.

The previous prime is 20868863. The next prime is 20868899. The reversal of 20868877 is 77886802.

It is a cyclic number.

It is not a de Polignac number, because 20868877 - 2²³ = 12480269 is a prime.

It is a super-2 number, since 2×20868877² = 871020054482258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20868847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54874 + ... + 55252.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^20868877 is an apocalyptic number.

It is an amenable number.

20868877 is a deficient number, since it is larger than the sum of its proper divisors (2113523).

20868877 is a wasteful number, since it uses less digits than its factorization.

20868877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 20868877 is about 4568.2466001739. The cubic root of 20868877 is about 275.3169986355.

The spelling of 20868877 in words is "twenty million, eight hundred sixty-eight thousand, eight hundred seventy-seven".