22639867 has 4 divisors (see below), whose sum is σ = 22712976. Its totient is φ = 22566760.

The previous prime is 22639861. The next prime is 22639873. The reversal of 22639867 is 76893622.

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

It is an interprime number because it is at equal distance from previous prime (22639861) and next prime (22639873).

It is a cyclic number.

It is not a de Polignac number, because 22639867 - 2⁷ = 22639739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22639861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36088 + ... + 36709.

It is an arithmetic number, because the mean of its divisors is an integer number (5678244).

Almost surely, 2^22639867 is an apocalyptic number.

22639867 is a deficient number, since it is larger than the sum of its proper divisors (73109).

22639867 is an equidigital number, since it uses as much as digits as its factorization.

22639867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73108.

The product of its digits is 217728, while the sum is 43.

The square root of 22639867 is about 4758.1369253102. The cubic root of 22639867 is about 282.8945779718.

The spelling of 22639867 in words is "twenty-two million, six hundred thirty-nine thousand, eight hundred sixty-seven".