22455923 has 4 divisors (see below), whose sum is σ = 25663920. Its totient is φ = 19247928.

The previous prime is 22455913. The next prime is 22455959. The reversal of 22455923 is 32955422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32955422 = 2 ⋅16477711.

It is not a de Polignac number, because 22455923 - 2¹⁰ = 22454899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22455923.

It is not an unprimeable number, because it can be changed into a prime (22455913) 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, 1603988 + ... + 1604001.

It is an arithmetic number, because the mean of its divisors is an integer number (6415980).

Almost surely, 2^22455923 is an apocalyptic number.

22455923 is a deficient number, since it is larger than the sum of its proper divisors (3207997).

22455923 is an equidigital number, since it uses as much as digits as its factorization.

22455923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207996.

The product of its digits is 21600, while the sum is 32.

The square root of 22455923 is about 4738.7680888602. The cubic root of 22455923 is about 282.1263412891.

The spelling of 22455923 in words is "twenty-two million, four hundred fifty-five thousand, nine hundred twenty-three".