23711920 has 80 divisors (see below), whose sum is σ = 57844512. Its totient is φ = 9031680.

The previous prime is 23711893. The next prime is 23711921. The reversal of 23711920 is 2911732.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (23711921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209784 + ... + 209896.

Almost surely, 2^23711920 is an apocalyptic number.

23711920 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 23711920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28922256).

23711920 is an abundant number, since it is smaller than the sum of its proper divisors (34132592).

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

23711920 is a wasteful number, since it uses less digits than its factorization.

23711920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 23711920 is about 4869.4886795227. The cubic root of 23711920 is about 287.2911451001.

The spelling of 23711920 in words is "twenty-three million, seven hundred eleven thousand, nine hundred twenty".