18122968169 has 4 divisors (see below), whose sum is σ = 18160182144. Its totient is φ = 18085754196.

The previous prime is 18122968163. The next prime is 18122968177. The reversal of 18122968169 is 96186922181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18122968169 - 2²⁰ = 18121919593 is a prime.

It is a super-2 number, since 2×18122968169² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18122968169.

It is not an unprimeable number, because it can be changed into a prime (18122968163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18606257 + ... + 18607230.

It is an arithmetic number, because the mean of its divisors is an integer number (4540045536).

Almost surely, 2^18122968169 is an apocalyptic number.

It is an amenable number.

18122968169 is a deficient number, since it is larger than the sum of its proper divisors (37213975).

18122968169 is an equidigital number, since it uses as much as digits as its factorization.

18122968169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37213974.

The product of its digits is 746496, while the sum is 53.

The spelling of 18122968169 in words is "eighteen billion, one hundred twenty-two million, nine hundred sixty-eight thousand, one hundred sixty-nine".