18004995 has 24 divisors (see below), whose sum is σ = 31876416. Its totient is φ = 9397248.

The previous prime is 18004991. The next prime is 18004999. The reversal of 18004995 is 59940081.

It is an interprime number because it is at equal distance from previous prime (18004991) and next prime (18004999).

It is not a de Polignac number, because 18004995 - 2² = 18004991 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18004991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2142 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (1328184).

Almost surely, 2^18004995 is an apocalyptic number.

18004995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18004995 is a deficient number, since it is larger than the sum of its proper divisors (13871421).

18004995 is a wasteful number, since it uses less digits than its factorization.

18004995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8571 (or 8568 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 18004995 is about 4243.2293126816. The cubic root of 18004995 is about 262.0983790368.

The spelling of 18004995 in words is "eighteen million, four thousand, nine hundred ninety-five".