23971920 has 160 divisors (see below), whose sum is σ = 89518080. Its totient is φ = 5184000.

The previous prime is 23971907. The next prime is 23971931. The reversal of 23971920 is 2917932.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 31545 + ... + 32295.

It is an arithmetic number, because the mean of its divisors is an integer number (559488).

Almost surely, 2^23971920 is an apocalyptic number.

23971920 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 23971920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44759040).

23971920 is an abundant number, since it is smaller than the sum of its proper divisors (65546160).

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

23971920 is a wasteful number, since it uses less digits than its factorization.

23971920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 23971920 is about 4896.1127437999. The cubic root of 23971920 is about 288.3373746932.

The spelling of 23971920 in words is "twenty-three million, nine hundred seventy-one thousand, nine hundred twenty".