22645863 has 12 divisors (see below), whose sum is σ = 32819280. Its totient is φ = 15047136.

The previous prime is 22645859. The next prime is 22645877. The reversal of 22645863 is 36854622.

22645863 is a `hidden beast` number, since 2 + 2 + 645 + 8 + 6 + 3 = 666.

It is not a de Polignac number, because 22645863 - 2² = 22645859 is a prime.

It is a super-2 number, since 2×22645863² = 1025670222029538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22645163) 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 11 ways as a sum of consecutive naturals, for example, 1203 + ... + 6836.

It is an arithmetic number, because the mean of its divisors is an integer number (2734940).

Almost surely, 2^22645863 is an apocalyptic number.

22645863 is a deficient number, since it is larger than the sum of its proper divisors (10173417).

22645863 is a wasteful number, since it uses less digits than its factorization.

22645863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8358 (or 8355 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 22645863 is about 4758.7669621447. The cubic root of 22645863 is about 282.9195499407.

The spelling of 22645863 in words is "twenty-two million, six hundred forty-five thousand, eight hundred sixty-three".