23659920 has 120 divisors (see below), whose sum is σ = 84175416. Its totient is φ = 5935104.

The previous prime is 23659907. The next prime is 23659927. The reversal of 23659920 is 2995632.

It can be written as a sum of positive squares in 4 ways, for example, as 6718464 + 16941456 = 2592^2 + 4116^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (23659927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11274 + ... + 13206.

Almost surely, 2^23659920 is an apocalyptic number.

23659920 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 23659920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42087708).

23659920 is an abundant number, since it is smaller than the sum of its proper divisors (60515496).

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

23659920 is a wasteful number, since it uses less digits than its factorization.

23659920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 23659920 is about 4864.1463793763. The cubic root of 23659920 is about 287.0809825415.

The spelling of 23659920 in words is "twenty-three million, six hundred fifty-nine thousand, nine hundred twenty".