23421656 has 8 divisors (see below), whose sum is σ = 43915620. Its totient is φ = 11710824.

The previous prime is 23421653. The next prime is 23421667. The reversal of 23421656 is 65612432.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23421653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1463846 + ... + 1463861.

Almost surely, 2^23421656 is an apocalyptic number.

It is an amenable number.

23421656 is a deficient number, since it is larger than the sum of its proper divisors (20493964).

23421656 is a wasteful number, since it uses less digits than its factorization.

23421656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927713 (or 2927709 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 23421656 is about 4839.5925448327. The cubic root of 23421656 is about 286.1140595151.

The spelling of 23421656 in words is "twenty-three million, four hundred twenty-one thousand, six hundred fifty-six".