18123877709 has 16 divisors (see below), whose sum is σ = 21649766400. Its totient is φ = 14834442480.

The previous prime is 18123877699. The next prime is 18123877711. The reversal of 18123877709 is 90777832181.

It is not a de Polignac number, because 18123877709 - 2³² = 13828910413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18123877799) 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, 2474 + ... + 190404.

It is an arithmetic number, because the mean of its divisors is an integer number (1353110400).

Almost surely, 2^18123877709 is an apocalyptic number.

It is an amenable number.

18123877709 is a deficient number, since it is larger than the sum of its proper divisors (3525888691).

18123877709 is a wasteful number, since it uses less digits than its factorization.

18123877709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188560.

The product of its (nonzero) digits is 1185408, while the sum is 53.

The spelling of 18123877709 in words is "eighteen billion, one hundred twenty-three million, eight hundred seventy-seven thousand, seven hundred nine".