20942886 has 16 divisors (see below), whose sum is σ = 42573168. Its totient is φ = 6866400.

The previous prime is 20942869. The next prime is 20942893. The reversal of 20942886 is 68824902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28245 + ... + 28976.

It is an arithmetic number, because the mean of its divisors is an integer number (2660823).

Almost surely, 2^20942886 is an apocalyptic number.

20942886 is an abundant number, since it is smaller than the sum of its proper divisors (21630282).

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

20942886 is a wasteful number, since it uses less digits than its factorization.

20942886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57287.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 20942886 is about 4576.3398038170. The cubic root of 20942886 is about 275.6420743635.

The spelling of 20942886 in words is "twenty million, nine hundred forty-two thousand, eight hundred eighty-six".