18873743605 has 16 divisors (see below), whose sum is σ = 23447718000. Its totient is φ = 14566988800.

The previous prime is 18873743593. The next prime is 18873743639. The reversal of 18873743605 is 50634737881.

It can be written as a sum of positive squares in 8 ways, for example, as 9458340516 + 9415403089 = 97254^2 + 97033^2 .

It is not a de Polignac number, because 18873743605 - 2⁵ = 18873743573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138621 + ... + 238669.

It is an arithmetic number, because the mean of its divisors is an integer number (1465482375).

Almost surely, 2^18873743605 is an apocalyptic number.

It is an amenable number.

18873743605 is a deficient number, since it is larger than the sum of its proper divisors (4573974395).

18873743605 is a wasteful number, since it uses less digits than its factorization.

18873743605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101384.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 18873743605 in words is "eighteen billion, eight hundred seventy-three million, seven hundred forty-three thousand, six hundred five".