22663864 has 8 divisors (see below), whose sum is σ = 42494760. Its totient is φ = 11331928.

The previous prime is 22663859. The next prime is 22663871. The reversal of 22663864 is 46836622.

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1416484 + ... + 1416499.

It is an arithmetic number, because the mean of its divisors is an integer number (5311845).

Almost surely, 2^22663864 is an apocalyptic number.

It is an amenable number.

22663864 is a deficient number, since it is larger than the sum of its proper divisors (19830896).

22663864 is a wasteful number, since it uses less digits than its factorization.

22663864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832989 (or 2832985 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 22663864 is about 4760.6579377225. The cubic root of 22663864 is about 282.9944935187.

The spelling of 22663864 in words is "twenty-two million, six hundred sixty-three thousand, eight hundred sixty-four".