22105918 has 8 divisors (see below), whose sum is σ = 33186240. Its totient is φ = 11043840.

The previous prime is 22105903. The next prime is 22105931. The reversal of 22105918 is 81950122.

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

It is a super-2 number, since 2×22105918² = 977343221245448, which contains 22 as substring.

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, 963 + ... + 6718.

It is an arithmetic number, because the mean of its divisors is an integer number (4148280).

Almost surely, 2^22105918 is an apocalyptic number.

22105918 is a deficient number, since it is larger than the sum of its proper divisors (11080322).

22105918 is a wasteful number, since it uses less digits than its factorization.

22105918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9122.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 22105918 is about 4701.6930992994. The cubic root of 22105918 is about 280.6528897071.

It can be divided in two parts, 2210 and 5918, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 22105918 in words is "twenty-two million, one hundred five thousand, nine hundred eighteen".