21364713 has 12 divisors (see below), whose sum is σ = 30904068. Its totient is φ = 14222880.

The previous prime is 21364709. The next prime is 21364727. The reversal of 21364713 is 31746312.

21364713 is a `hidden beast` number, since 2 + 1 + 3 + 647 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6985449 + 14379264 = 2643^2 + 3792^2 .

It is not a de Polignac number, because 21364713 - 2² = 21364709 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21364703) 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 11 ways as a sum of consecutive naturals, for example, 7783 + ... + 10163.

It is an arithmetic number, because the mean of its divisors is an integer number (2575339).

Almost surely, 2^21364713 is an apocalyptic number.

It is an amenable number.

21364713 is a deficient number, since it is larger than the sum of its proper divisors (9539355).

21364713 is a wasteful number, since it uses less digits than its factorization.

21364713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384 (or 3381 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 21364713 is about 4622.1978538353. The cubic root of 21364713 is about 277.4804271562.

The spelling of 21364713 in words is "twenty-one million, three hundred sixty-four thousand, seven hundred thirteen".