23551920 has 120 divisors (see below), whose sum is σ = 90413856. Its totient is φ = 5382144.

The previous prime is 23551903. The next prime is 23551921. The reversal of 23551920 is 2915532.

23551920 is a `hidden beast` number, since 23 + 551 + 92 + 0 = 666.

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

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (23551921) 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, 2704 + ... + 7376.

Almost surely, 2^23551920 is an apocalyptic number.

23551920 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 23551920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45206928).

23551920 is an abundant number, since it is smaller than the sum of its proper divisors (66861936).

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

23551920 is a wasteful number, since it uses less digits than its factorization.

23551920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699 (or 4690 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 23551920 is about 4853.0320419301. The cubic root of 23551920 is about 286.6435051295.

The spelling of 23551920 in words is "twenty-three million, five hundred fifty-one thousand, nine hundred twenty".