22718464 has 24 divisors (see below), whose sum is σ = 45429930. Its totient is φ = 11358208.

The previous prime is 22718459. The next prime is 22718473. The reversal of 22718464 is 46481722.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 6718464 = 4000^2 + 2592^2 .

It is a super-2 number, since 2×22718464² = 1032257213038592, which contains 22 as substring.

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499 + ... + 7594.

Almost surely, 2^22718464 is an apocalyptic number.

It is an amenable number.

22718464 is a deficient number, since it is larger than the sum of its proper divisors (22711466).

22718464 is an equidigital number, since it uses as much as digits as its factorization.

22718464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11115 (or 11095 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 22718464 is about 4766.3889895811. The cubic root of 22718464 is about 283.2215672979.

The spelling of 22718464 in words is "twenty-two million, seven hundred eighteen thousand, four hundred sixty-four".