22418959 has 4 divisors (see below), whose sum is σ = 22440600. Its totient is φ = 22397320.

The previous prime is 22418939. The next prime is 22418969. The reversal of 22418959 is 95981422.

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 22418959 - 2⁵ = 22418927 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 (22418939) 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, 9184 + ... + 11365.

It is an arithmetic number, because the mean of its divisors is an integer number (5610150).

Almost surely, 2^22418959 is an apocalyptic number.

22418959 is a deficient number, since it is larger than the sum of its proper divisors (21641).

22418959 is a wasteful number, since it uses less digits than its factorization.

22418959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21640.

The product of its digits is 51840, while the sum is 40.

The square root of 22418959 is about 4734.8663127907. The cubic root of 22418959 is about 281.9714564608.

The spelling of 22418959 in words is "twenty-two million, four hundred eighteen thousand, nine hundred fifty-nine".