20886855 has 32 divisors (see below), whose sum is σ = 36840960. Its totient is φ = 10020480.

The previous prime is 20886799. The next prime is 20886893. The reversal of 20886855 is 55868802.

It is not a de Polignac number, because 20886855 - 2⁶ = 20886791 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16381 + ... + 17609.

It is an arithmetic number, because the mean of its divisors is an integer number (1151280).

Almost surely, 2^20886855 is an apocalyptic number.

20886855 is a deficient number, since it is larger than the sum of its proper divisors (15954105).

20886855 is a wasteful number, since it uses less digits than its factorization.

20886855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 20886855 is about 4570.2138899618. The cubic root of 20886855 is about 275.3960354447.

The spelling of 20886855 in words is "twenty million, eight hundred eighty-six thousand, eight hundred fifty-five".