21886713 has 32 divisors (see below), whose sum is σ = 33996800. Its totient is φ = 13899600.

The previous prime is 21886703. The next prime is 21886729. The reversal of 21886713 is 31768812.

It is not a de Polignac number, because 21886713 - 2⁵ = 21886681 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21886703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65958 + ... + 66288.

It is an arithmetic number, because the mean of its divisors is an integer number (1062400).

Almost surely, 2^21886713 is an apocalyptic number.

It is an amenable number.

21886713 is a deficient number, since it is larger than the sum of its proper divisors (12110087).

21886713 is a wasteful number, since it uses less digits than its factorization.

21886713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 21886713 is about 4678.3237382635. The cubic root of 21886713 is about 279.7221435796.

The spelling of 21886713 in words is "twenty-one million, eight hundred eighty-six thousand, seven hundred thirteen".