18312083 has 4 divisors (see below), whose sum is σ = 18657648. Its totient is φ = 17966520.

The previous prime is 18312059. The next prime is 18312101. The reversal of 18312083 is 38021381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18312083 - 2⁸ = 18311827 is a prime.

It is a super-3 number, since 3×18312083³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18312013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172703 + ... + 172808.

It is an arithmetic number, because the mean of its divisors is an integer number (4664412).

Almost surely, 2^18312083 is an apocalyptic number.

18312083 is a deficient number, since it is larger than the sum of its proper divisors (345565).

18312083 is an equidigital number, since it uses as much as digits as its factorization.

18312083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345564.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18312083 is about 4279.2619690783. The cubic root of 18312083 is about 263.5800783276.

The spelling of 18312083 in words is "eighteen million, three hundred twelve thousand, eighty-three".