18054899 has 4 divisors (see below), whose sum is σ = 18134664. Its totient is φ = 17975136.

The previous prime is 18054893. The next prime is 18054917. The reversal of 18054899 is 99845081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99845081 = 7 ⋅14263583.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18054899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18054893) 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, 39542 + ... + 39995.

It is an arithmetic number, because the mean of its divisors is an integer number (4533666).

Almost surely, 2^18054899 is an apocalyptic number.

18054899 is a deficient number, since it is larger than the sum of its proper divisors (79765).

18054899 is an equidigital number, since it uses as much as digits as its factorization.

18054899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79764.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 18054899 is about 4249.1056706088. The cubic root of 18054899 is about 262.3403061946.

The spelling of 18054899 in words is "eighteen million, fifty-four thousand, eight hundred ninety-nine".