18119900 has 18 divisors (see below), whose sum is σ = 39320400. Its totient is φ = 7247920.

The previous prime is 18119897. The next prime is 18119917. The reversal of 18119900 is 991181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90500 + ... + 90699.

Almost surely, 2^18119900 is an apocalyptic number.

18119900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18119900 is an abundant number, since it is smaller than the sum of its proper divisors (21200500).

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

18119900 is a wasteful number, since it uses less digits than its factorization.

18119900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181213 (or 181206 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 18119900 is about 4256.7475847177. The cubic root of 18119900 is about 262.6547537979.

It can be divided in two parts, 1811 and 9900, that added together give a palindrome (11711).

The spelling of 18119900 in words is "eighteen million, one hundred nineteen thousand, nine hundred".