23421660 has 48 divisors (see below), whose sum is σ = 67187232. Its totient is φ = 6092800.

The previous prime is 23421653. The next prime is 23421667. The reversal of 23421660 is 6612432.

It is an interprime number because it is at equal distance from previous prime (23421653) and next prime (23421667).

It is a self number, because there is not a number n which added to its sum of digits gives 23421660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23421667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2301 + ... + 7220.

It is an arithmetic number, because the mean of its divisors is an integer number (1399734).

Almost surely, 2^23421660 is an apocalyptic number.

23421660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23421660 is an abundant number, since it is smaller than the sum of its proper divisors (43765572).

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

23421660 is a wasteful number, since it uses less digits than its factorization.

23421660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9574 (or 9572 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 23421660 is about 4839.5929580906. The cubic root of 23421660 is about 286.1140758029.

The spelling of 23421660 in words is "twenty-three million, four hundred twenty-one thousand, six hundred sixty".