23421740 has 48 divisors (see below), whose sum is σ = 52195584. Its totient is φ = 8812800.

The previous prime is 23421719. The next prime is 23421773. The reversal of 23421740 is 4712432.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22430 + ... + 23450.

It is an arithmetic number, because the mean of its divisors is an integer number (1087408).

Almost surely, 2^23421740 is an apocalyptic number.

23421740 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 23421740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26097792).

23421740 is an abundant number, since it is smaller than the sum of its proper divisors (28773844).

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

23421740 is a wasteful number, since it uses less digits than its factorization.

23421740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 23421740 is about 4839.6012232414. The cubic root of 23421740 is about 286.1144015569.

The spelling of 23421740 in words is "twenty-three million, four hundred twenty-one thousand, seven hundred forty".