22718713 has 4 divisors (see below), whose sum is σ = 22731940. Its totient is φ = 22705488.

The previous prime is 22718693. The next prime is 22718747. The reversal of 22718713 is 31781722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15896169 + 6822544 = 3987^2 + 2612^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22718713 is a prime.

It is a super-2 number, since 2×22718713² = 1032279840752738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22710713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3570 + ... + 7627.

It is an arithmetic number, because the mean of its divisors is an integer number (5682985).

Almost surely, 2^22718713 is an apocalyptic number.

It is an amenable number.

22718713 is a deficient number, since it is larger than the sum of its proper divisors (13227).

22718713 is a wasteful number, since it uses less digits than its factorization.

22718713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13226.

The product of its digits is 4704, while the sum is 31.

The square root of 22718713 is about 4766.4151099123. The cubic root of 22718713 is about 283.2226020203. Note that the first 3 decimals are identical.

The spelling of 22718713 in words is "twenty-two million, seven hundred eighteen thousand, seven hundred thirteen".