18445522 has 8 divisors (see below), whose sum is σ = 27763596. Its totient is φ = 9190992.

The previous prime is 18445519. The next prime is 18445541. The reversal of 18445522 is 22554481.

It can be written as a sum of positive squares in 2 ways, for example, as 16168441 + 2277081 = 4021^2 + 1509^2 .

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

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, 15153 + ... + 16324.

Almost surely, 2^18445522 is an apocalyptic number.

18445522 is a deficient number, since it is larger than the sum of its proper divisors (9318074).

18445522 is a wasteful number, since it uses less digits than its factorization.

18445522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31772.

The product of its digits is 12800, while the sum is 31.

The square root of 18445522 is about 4294.8250255395. The cubic root of 18445522 is about 264.2187599845.

The spelling of 18445522 in words is "eighteen million, four hundred forty-five thousand, five hundred twenty-two".