24561920 has 72 divisors (see below), whose sum is σ = 60829440. Its totient is φ = 9492480.

The previous prime is 24561919. The next prime is 24561937. The reversal of 24561920 is 2916542.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39371 + ... + 39989.

Almost surely, 2^24561920 is an apocalyptic number.

24561920 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 24561920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30414720).

24561920 is an abundant number, since it is smaller than the sum of its proper divisors (36267520).

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

24561920 is an equidigital number, since it uses as much as digits as its factorization.

24561920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 24561920 is about 4955.9983857947. The cubic root of 24561920 is about 290.6837611172.

The spelling of 24561920 in words is "twenty-four million, five hundred sixty-one thousand, nine hundred twenty".