23218713 has 12 divisors (see below), whose sum is σ = 38329408. Its totient is φ = 13267800.

The previous prime is 23218709. The next prime is 23218729. The reversal of 23218713 is 31781232.

It is not a de Polignac number, because 23218713 - 2² = 23218709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23218733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184213 + ... + 184338.

Almost surely, 2^23218713 is an apocalyptic number.

It is an amenable number.

23218713 is a deficient number, since it is larger than the sum of its proper divisors (15110695).

23218713 is a wasteful number, since it uses less digits than its factorization.

23218713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368564 (or 368561 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 23218713 is about 4818.5799775453. The cubic root of 23218713 is about 285.2852914222.

Adding to 23218713 its reverse (31781232), we get a palindrome (54999945).

The spelling of 23218713 in words is "twenty-three million, two hundred eighteen thousand, seven hundred thirteen".