22508947 has 4 divisors (see below), whose sum is σ = 22741096. Its totient is φ = 22276800.

The previous prime is 22508929. The next prime is 22508953. The reversal of 22508947 is 74980522.

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

It is a cyclic number.

It is not a de Polignac number, because 22508947 - 2²³ = 14120339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22505947) 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, 115929 + ... + 116122.

It is an arithmetic number, because the mean of its divisors is an integer number (5685274).

Almost surely, 2^22508947 is an apocalyptic number.

22508947 is a deficient number, since it is larger than the sum of its proper divisors (232149).

22508947 is an equidigital number, since it uses as much as digits as its factorization.

22508947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232148.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 22508947 is about 4744.3594931244. The cubic root of 22508947 is about 282.3482234804.

The spelling of 22508947 in words is "twenty-two million, five hundred eight thousand, nine hundred forty-seven".