18067481091 has 12 divisors (see below), whose sum is σ = 28469970360. Its totient is φ = 10949988480.

The previous prime is 18067481071. The next prime is 18067481167. The reversal of 18067481091 is 19018476081.

It is a happy number.

18067481091 is a `hidden beast` number, since 1 + 80 + 6 + 7 + 481 + 0 + 91 = 666.

It is not a de Polignac number, because 18067481091 - 2⁹ = 18067480579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18067481071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91249806 + ... + 91250003.

It is an arithmetic number, because the mean of its divisors is an integer number (2372497530).

Almost surely, 2^18067481091 is an apocalyptic number.

18067481091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18067481091 is a deficient number, since it is larger than the sum of its proper divisors (10402489269).

18067481091 is a wasteful number, since it uses less digits than its factorization.

18067481091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182499826 (or 182499823 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The spelling of 18067481091 in words is "eighteen billion, sixty-seven million, four hundred eighty-one thousand, ninety-one".