22222918 has 8 divisors (see below), whose sum is σ = 33736248. Its totient is φ = 10977504.

The previous prime is 22222909. The next prime is 22222957. The reversal of 22222918 is 81922222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66771 + ... + 67102.

It is an arithmetic number, because the mean of its divisors is an integer number (4217031).

Almost surely, 2^22222918 is an apocalyptic number.

22222918 is a deficient number, since it is larger than the sum of its proper divisors (11513330).

22222918 is a wasteful number, since it uses less digits than its factorization.

22222918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133958.

The product of its digits is 2304, while the sum is 28.

The square root of 22222918 is about 4714.1190057104. The cubic root of 22222918 is about 281.1471559452.

The spelling of 22222918 in words is "twenty-two million, two hundred twenty-two thousand, nine hundred eighteen".