18985122 has 54 divisors (see below), whose sum is σ = 45112977. Its totient is φ = 5767632.

The previous prime is 18985093. The next prime is 18985157. The reversal of 18985122 is 22158981.

It can be written as a sum of positive squares in 2 ways, for example, as 16232841 + 2752281 = 4029^2 + 1659^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3081.

Its product of digits (11520) is a multiple of the sum of its prime factors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 240279 + ... + 240357.

Almost surely, 2^18985122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18985122

18985122 is an abundant number, since it is smaller than the sum of its proper divisors (26127855).

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

18985122 is a wasteful number, since it uses less digits than its factorization.

18985122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 97 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 18985122 is about 4357.1919856715. The cubic root of 18985122 is about 266.7704967200.

The spelling of 18985122 in words is "eighteen million, nine hundred eighty-five thousand, one hundred twenty-two".