23664451 has 2 divisors, whose sum is σ = 23664452. Its totient is φ = 23664450.

The previous prime is 23664449. The next prime is 23664457. The reversal of 23664451 is 15446632.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23664451 - 2¹ = 23664449 is a prime.

It is a super-2 number, since 2×23664451² = 1120012482262802, which contains 22 as substring.

Together with 23664449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23664457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11832225 + 11832226.

It is an arithmetic number, because the mean of its divisors is an integer number (11832226).

Almost surely, 2^23664451 is an apocalyptic number.

23664451 is a deficient number, since it is larger than the sum of its proper divisors (1).

23664451 is an equidigital number, since it uses as much as digits as its factorization.

23664451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

The square root of 23664451 is about 4864.6121119777. The cubic root of 23664451 is about 287.0993072147.

The spelling of 23664451 in words is "twenty-three million, six hundred sixty-four thousand, four hundred fifty-one".