24421920 has 96 divisors (see below), whose sum is σ = 77982912. Its totient is φ = 6423552.

The previous prime is 24421889. The next prime is 24421921. The reversal of 24421920 is 2912442.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (24421921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39534 + ... + 40146.

It is an arithmetic number, because the mean of its divisors is an integer number (812322).

Almost surely, 2^24421920 is an apocalyptic number.

24421920 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 24421920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38991456).

24421920 is an abundant number, since it is smaller than the sum of its proper divisors (53560992).

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

24421920 is a wasteful number, since it uses less digits than its factorization.

24421920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 24421920 is about 4941.8539031420. The cubic root of 24421920 is about 290.1304209251.

The spelling of 24421920 in words is "twenty-four million, four hundred twenty-one thousand, nine hundred twenty".