22668638 has 4 divisors (see below), whose sum is σ = 34002960. Its totient is φ = 11334318.

The previous prime is 22668623. The next prime is 22668641. The reversal of 22668638 is 83686622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83686622 = 2 ⋅41843311.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22668595 and 22668604.

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, 5667158 + ... + 5667161.

It is an arithmetic number, because the mean of its divisors is an integer number (8500740).

Almost surely, 2^22668638 is an apocalyptic number.

22668638 is a deficient number, since it is larger than the sum of its proper divisors (11334322).

22668638 is a wasteful number, since it uses less digits than its factorization.

22668638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11334321.

The product of its digits is 165888, while the sum is 41.

The square root of 22668638 is about 4761.1593126044. The cubic root of 22668638 is about 283.0143624587.

The spelling of 22668638 in words is "twenty-two million, six hundred sixty-eight thousand, six hundred thirty-eight".