18934469091 has 32 divisors (see below), whose sum is σ = 28604259840. Its totient is φ = 12376476000.

The previous prime is 18934469069. The next prime is 18934469093. The reversal of 18934469091 is 19096443981.

It is a happy number.

18934469091 is a `hidden beast` number, since 1 + 8 + 93 + 4 + 469 + 0 + 91 = 666.

It is not a de Polignac number, because 18934469091 - 2²⁶ = 18867360227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18934469093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247176 + ... + 314586.

It is an arithmetic number, because the mean of its divisors is an integer number (893883120).

Almost surely, 2^18934469091 is an apocalyptic number.

18934469091 is a deficient number, since it is larger than the sum of its proper divisors (9669790749).

18934469091 is a wasteful number, since it uses less digits than its factorization.

18934469091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67624 (or 67618 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 18934469091 in words is "eighteen billion, nine hundred thirty-four million, four hundred sixty-nine thousand, ninety-one".