22118931 has 12 divisors (see below), whose sum is σ = 32181240. Its totient is φ = 14639040.

The previous prime is 22118891. The next prime is 22118947. The reversal of 22118931 is 13981122.

It is not a de Polignac number, because 22118931 - 2⁶ = 22118867 is a prime.

It is a super-2 number, since 2×22118931² = 978494217165522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22118895 and 22118904.

It is not an unprimeable number, because it can be changed into a prime (22118951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7590 + ... + 10091.

It is an arithmetic number, because the mean of its divisors is an integer number (2681770).

Almost surely, 2^22118931 is an apocalyptic number.

22118931 is a deficient number, since it is larger than the sum of its proper divisors (10062309).

22118931 is a wasteful number, since it uses less digits than its factorization.

22118931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17826 (or 17823 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 22118931 is about 4703.0767588888. The cubic root of 22118931 is about 280.7079491662.

The spelling of 22118931 in words is "twenty-two million, one hundred eighteen thousand, nine hundred thirty-one".