18114139 has 6 divisors (see below), whose sum is σ = 18262316. Its totient is φ = 17966760.

The previous prime is 18114101. The next prime is 18114149. The reversal of 18114139 is 93141181.

It is not a de Polignac number, because 18114139 - 2²³ = 9725531 is a prime.

It is a super-2 number, since 2×18114139² = 656244063422642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18114149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61677 + ... + 61969.

Almost surely, 2^18114139 is an apocalyptic number.

18114139 is a deficient number, since it is larger than the sum of its proper divisors (148177).

18114139 is an frugal number, since it uses more digits than its factorization.

18114139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 504 counting only the distinct ones).

The product of its digits is 864, while the sum is 28.

The square root of 18114139 is about 4256.0708405758. The cubic root of 18114139 is about 262.6269148947.

It can be divided in two parts, 18 and 114139, that multiplied together give a palindrome (2054502).

The spelling of 18114139 in words is "eighteen million, one hundred fourteen thousand, one hundred thirty-nine".