23421940 has 24 divisors (see below), whose sum is σ = 49335552. Its totient is φ = 9340320.

The previous prime is 23421899. The next prime is 23421961. The reversal of 23421940 is 4912432.

It is a congruent 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, 5745 + ... + 8935.

It is an arithmetic number, because the mean of its divisors is an integer number (2055648).

Almost surely, 2^23421940 is an apocalyptic number.

23421940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23421940 is an abundant number, since it is smaller than the sum of its proper divisors (25913612).

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

23421940 is a wasteful number, since it uses less digits than its factorization.

23421940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567 (or 3565 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 23421940 is about 4839.6218860568. The cubic root of 23421940 is about 286.1152159387.

The spelling of 23421940 in words is "twenty-three million, four hundred twenty-one thousand, nine hundred forty".