23564638 has 4 divisors (see below), whose sum is σ = 35346960. Its totient is φ = 11782318.

The previous prime is 23564603. The next prime is 23564641. The reversal of 23564638 is 83646532.

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

It is a junction number, because it is equal to n+sod(n) for n = 23564597 and 23564606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5891158 + ... + 5891161.

It is an arithmetic number, because the mean of its divisors is an integer number (8836740).

Almost surely, 2^23564638 is an apocalyptic number.

23564638 is a deficient number, since it is larger than the sum of its proper divisors (11782322).

23564638 is a wasteful number, since it uses less digits than its factorization.

23564638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11782321.

The product of its digits is 103680, while the sum is 37.

The square root of 23564638 is about 4854.3421799457. The cubic root of 23564638 is about 286.6950915267.

The spelling of 23564638 in words is "twenty-three million, five hundred sixty-four thousand, six hundred thirty-eight".