22118986 has 4 divisors (see below), whose sum is σ = 33178482. Its totient is φ = 11059492.

The previous prime is 22118981. The next prime is 22119001. The reversal of 22118986 is 68981122.

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

It can be written as a sum of positive squares in only one way, i.e., 20875761 + 1243225 = 4569^2 + 1115^2 .

It is not an unprimeable number, because it can be changed into a prime (22118981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5529745 + ... + 5529748.

Almost surely, 2^22118986 is an apocalyptic number.

22118986 is a deficient number, since it is larger than the sum of its proper divisors (11059496).

22118986 is a wasteful number, since it uses less digits than its factorization.

22118986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11059495.

The product of its digits is 13824, while the sum is 37.

The square root of 22118986 is about 4703.0826061212. The cubic root of 22118986 is about 280.7081818315.

It can be divided in two parts, 22118 and 986, that added together give a square (23104 = 152²).

The spelling of 22118986 in words is "twenty-two million, one hundred eighteen thousand, nine hundred eighty-six".