18027704391 has 16 divisors (see below), whose sum is σ = 25085864160. Its totient is φ = 11501342720.

The previous prime is 18027704353. The next prime is 18027704399. The reversal of 18027704391 is 19340772081.

It is a cyclic number.

It is not a de Polignac number, because 18027704391 - 2⁷ = 18027704263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027704399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907050 + ... + 926711.

It is an arithmetic number, because the mean of its divisors is an integer number (1567866510).

Almost surely, 2^18027704391 is an apocalyptic number.

18027704391 is a deficient number, since it is larger than the sum of its proper divisors (7058159769).

18027704391 is a wasteful number, since it uses less digits than its factorization.

18027704391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833906.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 18027704391 in words is "eighteen billion, twenty-seven million, seven hundred four thousand, three hundred ninety-one".