23513520 has 40 divisors (see below), whose sum is σ = 72892656. Its totient is φ = 6270208.

The previous prime is 23513513. The next prime is 23513527. The reversal of 23513520 is 2531532.

It is an interprime number because it is at equal distance from previous prime (23513513) and next prime (23513527).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (23513527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48747 + ... + 49226.

Almost surely, 2^23513520 is an apocalyptic number.

23513520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23513520 is an abundant number, since it is smaller than the sum of its proper divisors (49379136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23513520 is a wasteful number, since it uses less digits than its factorization.

23513520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97989 (or 97983 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 23513520 is about 4849.0741384310. The cubic root of 23513520 is about 286.4876353438.

The spelling of 23513520 in words is "twenty-three million, five hundred thirteen thousand, five hundred twenty".