18111952 has 10 divisors (see below), whose sum is σ = 35091938. Its totient is φ = 9055968.

The previous prime is 18111949. The next prime is 18112001. The reversal of 18111952 is 25911181.

It can be written as a sum of positive squares in only one way, i.e., 16613776 + 1498176 = 4076^2 + 1224^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18111952.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565983 + ... + 566014.

Almost surely, 2^18111952 is an apocalyptic number.

It is an amenable number.

18111952 is a deficient number, since it is larger than the sum of its proper divisors (16979986).

18111952 is a wasteful number, since it uses less digits than its factorization.

18111952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132005 (or 1131999 counting only the distinct ones).

The product of its digits is 720, while the sum is 28.

The square root of 18111952 is about 4255.8139057059. The cubic root of 18111952 is about 262.6163451002.

The spelling of 18111952 in words is "eighteen million, one hundred eleven thousand, nine hundred fifty-two".