20968986 has 8 divisors (see below), whose sum is σ = 41937984. Its totient is φ = 6989660.

The previous prime is 20968979. The next prime is 20969009. The reversal of 20968986 is 68986902.

It is a sphenic number, since it is the product of 3 distinct primes.

20968986 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747410 + ... + 1747421.

It is an arithmetic number, because the mean of its divisors is an integer number (5242248).

Almost surely, 2^20968986 is an apocalyptic number.

20968986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20968986 is a wasteful number, since it uses less digits than its factorization.

20968986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3494836.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 20968986 is about 4579.1905398225. The cubic root of 20968986 is about 275.7565328261.

The spelling of 20968986 in words is "twenty million, nine hundred sixty-eight thousand, nine hundred eighty-six".