18106722 has 24 divisors (see below), whose sum is σ = 39309660. Its totient is φ = 6023520.

The previous prime is 18106667. The next prime is 18106733. The reversal of 18106722 is 22760181.

It can be written as a sum of positive squares in 2 ways, for example, as 18071001 + 35721 = 4251^2 + 189^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16404 + ... + 17472.

Almost surely, 2^18106722 is an apocalyptic number.

18106722 is an abundant number, since it is smaller than the sum of its proper divisors (21202938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18106722 is a wasteful number, since it uses less digits than its factorization.

18106722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018 (or 2015 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 18106722 is about 4255.1994077834. The cubic root of 18106722 is about 262.5910650032.

It can be divided in two parts, 18 and 106722, that multiplied together give a square (1920996 = 1386²).

The spelling of 18106722 in words is "eighteen million, one hundred six thousand, seven hundred twenty-two".