18139795 has 8 divisors (see below), whose sum is σ = 21806640. Its totient is φ = 14485920.

The previous prime is 18139789. The next prime is 18139811. The reversal of 18139795 is 59793181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18139795 - 2³ = 18139787 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165 + ... + 6025.

It is an arithmetic number, because the mean of its divisors is an integer number (2725830).

Almost surely, 2^18139795 is an apocalyptic number.

18139795 is a deficient number, since it is larger than the sum of its proper divisors (3666845).

18139795 is an equidigital number, since it uses as much as digits as its factorization.

18139795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6485.

The product of its digits is 68040, while the sum is 43.

The square root of 18139795 is about 4259.0838216687. The cubic root of 18139795 is about 262.7508471357.

The spelling of 18139795 in words is "eighteen million, one hundred thirty-nine thousand, seven hundred ninety-five".