18133995 has 16 divisors (see below), whose sum is σ = 31652352. Its totient is φ = 8792160.

The previous prime is 18133993. The next prime is 18134009. The reversal of 18133995 is 59933181.

It is not a de Polignac number, because 18133995 - 2¹ = 18133993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18133991) 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, 54787 + ... + 55116.

It is an arithmetic number, because the mean of its divisors is an integer number (1978272).

Almost surely, 2^18133995 is an apocalyptic number.

18133995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18133995 is a deficient number, since it is larger than the sum of its proper divisors (13518357).

18133995 is a wasteful number, since it uses less digits than its factorization.

18133995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109922.

The product of its digits is 29160, while the sum is 39.

The square root of 18133995 is about 4258.4028696214. The cubic root of 18133995 is about 262.7228402524.

The spelling of 18133995 in words is "eighteen million, one hundred thirty-three thousand, nine hundred ninety-five".