18312039703 has 4 divisors (see below), whose sum is σ = 18456229120. Its totient is φ = 18167850288.

The previous prime is 18312039677. The next prime is 18312039721. The reversal of 18312039703 is 30793021381.

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 18312039703 - 2¹³ = 18312031511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18312039503) 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, 72094518 + ... + 72094771.

It is an arithmetic number, because the mean of its divisors is an integer number (4614057280).

Almost surely, 2^18312039703 is an apocalyptic number.

18312039703 is a deficient number, since it is larger than the sum of its proper divisors (144189417).

18312039703 is a wasteful number, since it uses less digits than its factorization.

18312039703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144189416.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 18312039703 in words is "eighteen billion, three hundred twelve million, thirty-nine thousand, seven hundred three".