18119808 has 192 divisors, whose sum is σ = 62791200. Its totient is φ = 5128704.

The previous prime is 18119797. The next prime is 18119819. The reversal of 18119808 is 80891181.

It is an interprime number because it is at equal distance from previous prime (18119797) and next prime (18119819).

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169291 + ... + 169397.

Almost surely, 2^18119808 is an apocalyptic number.

18119808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18119808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31395600).

18119808 is an abundant number, since it is smaller than the sum of its proper divisors (44671392).

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

18119808 is a wasteful number, since it uses less digits than its factorization.

18119808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 18119808 is about 4256.7367783315. The cubic root of 18119808 is about 262.6543092723.

The spelling of 18119808 in words is "eighteen million, one hundred nineteen thousand, eight hundred eight".