18926718518 has 8 divisors (see below), whose sum is σ = 28390846680. Its totient is φ = 9463102960.

The previous prime is 18926718493. The next prime is 18926718529. The reversal of 18926718518 is 81581762981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16328 + ... + 195243.

It is an arithmetic number, because the mean of its divisors is an integer number (3548855835).

Almost surely, 2^18926718518 is an apocalyptic number.

18926718518 is a deficient number, since it is larger than the sum of its proper divisors (9464128162).

18926718518 is a wasteful number, since it uses less digits than its factorization.

18926718518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256302.

The product of its digits is 1935360, while the sum is 56.

The spelling of 18926718518 in words is "eighteen billion, nine hundred twenty-six million, seven hundred eighteen thousand, five hundred eighteen".