21610713 has 16 divisors (see below), whose sum is σ = 30153600. Its totient is φ = 13749120.

The previous prime is 21610691. The next prime is 21610753. The reversal of 21610713 is 31701612.

It is not a de Polignac number, because 21610713 - 2⁵ = 21610681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21610713.

It is not an unprimeable number, because it can be changed into a prime (21610753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6348 + ... + 9138.

It is an arithmetic number, because the mean of its divisors is an integer number (1884600).

Almost surely, 2^21610713 is an apocalyptic number.

It is an amenable number.

21610713 is a deficient number, since it is larger than the sum of its proper divisors (8542887).

21610713 is a wasteful number, since it uses less digits than its factorization.

21610713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 21610713 is about 4648.7324078721. The cubic root of 21610713 is about 278.5413643896.

The spelling of 21610713 in words is "twenty-one million, six hundred ten thousand, seven hundred thirteen".