18119899 has 16 divisors (see below), whose sum is σ = 21776128. Its totient is φ = 14751072.

The previous prime is 18119897. The next prime is 18119917. The reversal of 18119899 is 99891181.

It is not a de Polignac number, because 18119899 - 2¹ = 18119897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18119897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10324 + ... + 11950.

It is an arithmetic number, because the mean of its divisors is an integer number (1361008).

Almost surely, 2^18119899 is an apocalyptic number.

18119899 is a deficient number, since it is larger than the sum of its proper divisors (3656229).

18119899 is a wasteful number, since it uses less digits than its factorization.

18119899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714.

The product of its digits is 46656, while the sum is 46.

The square root of 18119899 is about 4256.7474672571. The cubic root of 18119899 is about 262.6547489661.

The spelling of 18119899 in words is "eighteen million, one hundred nineteen thousand, eight hundred ninety-nine".