23481920 has 112 divisors (see below), whose sum is σ = 69787008. Its totient is φ = 7311360.

The previous prime is 23481907. The next prime is 23481923. The reversal of 23481920 is 2918432.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (23481923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24164 + ... + 25116.

Almost surely, 2^23481920 is an apocalyptic number.

23481920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23481920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34893504).

23481920 is an abundant number, since it is smaller than the sum of its proper divisors (46305088).

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

23481920 is a wasteful number, since it uses less digits than its factorization.

23481920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 23481920 is about 4845.8146889868. The cubic root of 23481920 is about 286.3592401655.

The spelling of 23481920 in words is "twenty-three million, four hundred eighty-one thousand, nine hundred twenty".