18292139 has 8 divisors (see below), whose sum is σ = 19166208. Its totient is φ = 17435880.

The previous prime is 18292133. The next prime is 18292151. The reversal of 18292139 is 93129281.

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

It is a cyclic number.

It is not a de Polignac number, because 18292139 - 2⁴ = 18292123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18292099 and 18292108.

It is not an unprimeable number, because it can be changed into a prime (18292133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2327 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (2395776).

Almost surely, 2^18292139 is an apocalyptic number.

18292139 is a deficient number, since it is larger than the sum of its proper divisors (874069).

18292139 is an equidigital number, since it uses as much as digits as its factorization.

18292139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8905.

The product of its digits is 7776, while the sum is 35.

The square root of 18292139 is about 4276.9310258642. The cubic root of 18292139 is about 263.4843537236.

The spelling of 18292139 in words is "eighteen million, two hundred ninety-two thousand, one hundred thirty-nine".