22138018 has 8 divisors (see below), whose sum is σ = 37950912. Its totient is φ = 9487716.

The previous prime is 22138003. The next prime is 22138031. The reversal of 22138018 is 81083122.

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

It is a junction number, because it is equal to n+sod(n) for n = 22137983 and 22138001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790630 + ... + 790657.

It is an arithmetic number, because the mean of its divisors is an integer number (4743864).

Almost surely, 2^22138018 is an apocalyptic number.

22138018 is a deficient number, since it is larger than the sum of its proper divisors (15812894).

22138018 is a wasteful number, since it uses less digits than its factorization.

22138018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581296.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 22138018 is about 4705.1055248528. The cubic root of 22138018 is about 280.7886693453.

The spelling of 22138018 in words is "twenty-two million, one hundred thirty-eight thousand, eighteen".