18427344039 has 24 divisors (see below), whose sum is σ = 28689002160. Its totient is φ = 11330312832.

The previous prime is 18427344037. The next prime is 18427344073. The reversal of 18427344039 is 93044372481.

18427344039 is a `hidden beast` number, since 184 + 27 + 3 + 440 + 3 + 9 = 666.

It is not a de Polignac number, because 18427344039 - 2¹ = 18427344037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18427343985 and 18427344003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18427344037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73572 + ... + 205590.

It is an arithmetic number, because the mean of its divisors is an integer number (1195375090).

Almost surely, 2^18427344039 is an apocalyptic number.

18427344039 is a deficient number, since it is larger than the sum of its proper divisors (10261658121).

18427344039 is a wasteful number, since it uses less digits than its factorization.

18427344039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133231 (or 133228 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 18427344039 in words is "eighteen billion, four hundred twenty-seven million, three hundred forty-four thousand, thirty-nine".