18113908 has 12 divisors (see below), whose sum is σ = 33564132. Its totient is φ = 8524160.

The previous prime is 18113881. The next prime is 18113929. The reversal of 18113908 is 80931181.

It can be written as a sum of positive squares in 2 ways, for example, as 16418704 + 1695204 = 4052^2 + 1302^2 .

It is a super-2 number, since 2×18113908² = 656227326064928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18113908.

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 in 3 ways as a sum of consecutive naturals, for example, 133123 + ... + 133258.

It is an arithmetic number, because the mean of its divisors is an integer number (2797011).

Almost surely, 2^18113908 is an apocalyptic number.

It is an amenable number.

18113908 is a deficient number, since it is larger than the sum of its proper divisors (15450224).

18113908 is a wasteful number, since it uses less digits than its factorization.

18113908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266402 (or 266400 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 18113908 is about 4256.0437027831. The cubic root of 18113908 is about 262.6257985094.

The spelling of 18113908 in words is "eighteen million, one hundred thirteen thousand, nine hundred eight".