18693879123 has 16 divisors (see below), whose sum is σ = 25514366976. Its totient is φ = 12169215360.

The previous prime is 18693879103. The next prime is 18693879137. The reversal of 18693879123 is 32197839681.

It is not a de Polignac number, because 18693879123 - 2⁶ = 18693879059 is a prime.

It is a super-2 number, since 2×18693879123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18693879103) 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, 92043 + ... + 214148.

It is an arithmetic number, because the mean of its divisors is an integer number (1594647936).

Almost surely, 2^18693879123 is an apocalyptic number.

18693879123 is a deficient number, since it is larger than the sum of its proper divisors (6820487853).

18693879123 is a wasteful number, since it uses less digits than its factorization.

18693879123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306674.

The product of its digits is 3919104, while the sum is 57.

The spelling of 18693879123 in words is "eighteen billion, six hundred ninety-three million, eight hundred seventy-nine thousand, one hundred twenty-three".