23664541 has 4 divisors (see below), whose sum is σ = 23692284. Its totient is φ = 23636800.

The previous prime is 23664521. The next prime is 23664581. The reversal of 23664541 is 14546632.

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 2042041 + 21622500 = 1429^2 + 4650^2 .

It is a cyclic number.

It is not a de Polignac number, because 23664541 - 2⁷ = 23664413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23664521) 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, 12550 + ... + 14311.

It is an arithmetic number, because the mean of its divisors is an integer number (5923071).

Almost surely, 2^23664541 is an apocalyptic number.

It is an amenable number.

23664541 is a deficient number, since it is larger than the sum of its proper divisors (27743).

23664541 is an equidigital number, since it uses as much as digits as its factorization.

23664541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27742.

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

The square root of 23664541 is about 4864.6213624495. The cubic root of 23664541 is about 287.0996711770.

The spelling of 23664541 in words is "twenty-three million, six hundred sixty-four thousand, five hundred forty-one".