20220855 has 16 divisors (see below), whose sum is σ = 32413920. Its totient is φ = 10764288.

The previous prime is 20220839. The next prime is 20220869. The reversal of 20220855 is 55802202.

It is not a de Polignac number, because 20220855 - 2⁴ = 20220839 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10659 + ... + 12411.

It is an arithmetic number, because the mean of its divisors is an integer number (2025870).

Almost surely, 2^20220855 is an apocalyptic number.

20220855 is a deficient number, since it is larger than the sum of its proper divisors (12193065).

20220855 is a wasteful number, since it uses less digits than its factorization.

20220855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 20220855 is about 4496.7605006271. The cubic root of 20220855 is about 272.4372607576.

The spelling of 20220855 in words is "twenty million, two hundred twenty thousand, eight hundred fifty-five".