23809920 has 64 divisors (see below), whose sum is σ = 75900240. Its totient is φ = 6348800.

The previous prime is 23809909. The next prime is 23809927. The reversal of 23809920 is 2990832.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23809927) 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, 4281 + ... + 8120.

Almost surely, 2^23809920 is an apocalyptic number.

23809920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23809920 is an abundant number, since it is smaller than the sum of its proper divisors (52090320).

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

23809920 is a wasteful number, since it uses less digits than its factorization.

23809920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12423 (or 12411 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 23809920 is about 4879.5409620168. The cubic root of 23809920 is about 287.6863870152.

The spelling of 23809920 in words is "twenty-three million, eight hundred nine thousand, nine hundred twenty".