23656642 has 4 divisors (see below), whose sum is σ = 35484966. Its totient is φ = 11828320.

The previous prime is 23656637. The next prime is 23656657. The reversal of 23656642 is 24665632.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12103441 + 11553201 = 3479^2 + 3399^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23656598 and 23656607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5914159 + ... + 5914162.

Almost surely, 2^23656642 is an apocalyptic number.

23656642 is a deficient number, since it is larger than the sum of its proper divisors (11828324).

23656642 is a wasteful number, since it uses less digits than its factorization.

23656642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11828323.

The product of its digits is 51840, while the sum is 34.

The square root of 23656642 is about 4863.8094123845. The cubic root of 23656642 is about 287.0677239038.

The spelling of 23656642 in words is "twenty-three million, six hundred fifty-six thousand, six hundred forty-two".