18667809097 has 16 divisors (see below), whose sum is σ = 22445684352. Its totient is φ = 15188791680.

The previous prime is 18667809091. The next prime is 18667809109. The reversal of 18667809097 is 79090876681.

It is a cyclic number.

It is not a de Polignac number, because 18667809097 - 2¹⁵ = 18667776329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18667809091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 868363 + ... + 889600.

It is an arithmetic number, because the mean of its divisors is an integer number (1402855272).

Almost surely, 2^18667809097 is an apocalyptic number.

It is an amenable number.

18667809097 is a deficient number, since it is larger than the sum of its proper divisors (3777875255).

18667809097 is a wasteful number, since it uses less digits than its factorization.

18667809097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758048.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The spelling of 18667809097 in words is "eighteen billion, six hundred sixty-seven million, eight hundred nine thousand, ninety-seven".