20212986 has 16 divisors (see below), whose sum is σ = 40471200. Its totient is φ = 6730128.

The previous prime is 20212937. The next prime is 20212991. The reversal of 20212986 is 68921202.

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, 7600 + ... + 9908.

It is an arithmetic number, because the mean of its divisors is an integer number (2529450).

Almost surely, 2^20212986 is an apocalyptic number.

20212986 is an abundant number, since it is smaller than the sum of its proper divisors (20258214).

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

20212986 is a wasteful number, since it uses less digits than its factorization.

20212986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20212986 is about 4495.8854522774. The cubic root of 20212986 is about 272.4019162753.

The spelling of 20212986 in words is "twenty million, two hundred twelve thousand, nine hundred eighty-six".