22643967 has 4 divisors (see below), whose sum is σ = 30191960. Its totient is φ = 15095976.

The previous prime is 22643921. The next prime is 22643969. The reversal of 22643967 is 76934622.

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

It is not a de Polignac number, because 22643967 - 2⁶ = 22643903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643969) 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, 3773992 + ... + 3773997.

It is an arithmetic number, because the mean of its divisors is an integer number (7547990).

Almost surely, 2^22643967 is an apocalyptic number.

22643967 is a deficient number, since it is larger than the sum of its proper divisors (7547993).

22643967 is an equidigital number, since it uses as much as digits as its factorization.

22643967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547992.

The product of its digits is 108864, while the sum is 39.

The square root of 22643967 is about 4758.5677467070. The cubic root of 22643967 is about 282.9116540109.

The spelling of 22643967 in words is "twenty-two million, six hundred forty-three thousand, nine hundred sixty-seven".