18115196 has 12 divisors (see below), whose sum is σ = 34583640. Its totient is φ = 8234160.

The previous prime is 18115193. The next prime is 18115211. The reversal of 18115196 is 69151181.

It is a super-2 number, since 2×18115196² = 656320652236832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18115193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205811 + ... + 205898.

It is an arithmetic number, because the mean of its divisors is an integer number (2881970).

Almost surely, 2^18115196 is an apocalyptic number.

It is an amenable number.

18115196 is a deficient number, since it is larger than the sum of its proper divisors (16468444).

18115196 is a wasteful number, since it uses less digits than its factorization.

18115196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411724 (or 411722 counting only the distinct ones).

The product of its digits is 2160, while the sum is 32.

The square root of 18115196 is about 4256.1950143291. The cubic root of 18115196 is about 262.6320230821.

It can be divided in two parts, 1811 and 5196, that added together give a palindrome (7007).

The spelling of 18115196 in words is "eighteen million, one hundred fifteen thousand, one hundred ninety-six".