18698122 has 4 divisors (see below), whose sum is σ = 28047186. Its totient is φ = 9349060.

The previous prime is 18698107. The next prime is 18698131. The reversal of 18698122 is 22189681.

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., 13549761 + 5148361 = 3681^2 + 2269^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4674529 + ... + 4674532.

Almost surely, 2^18698122 is an apocalyptic number.

18698122 is a deficient number, since it is larger than the sum of its proper divisors (9349064).

18698122 is an equidigital number, since it uses as much as digits as its factorization.

18698122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9349063.

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

The square root of 18698122 is about 4324.1325141582. The cubic root of 18698122 is about 265.4193999698.

The spelling of 18698122 in words is "eighteen million, six hundred ninety-eight thousand, one hundred twenty-two".