18734491876 has 9 divisors (see below), whose sum is σ = 32785839849. Its totient is φ = 9367109064.

The previous prime is 18734491873. The next prime is 18734491877. The reversal of 18734491876 is 67819443781.

It is a happy number.

The square root of 18734491876 is 136874.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11064936100 + 7669555776 = 105190^2 + 87576^2 .

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 18734491876.

It is not an unprimeable number, because it can be changed into a prime (18734491873) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 239530 + ... + 307966.

Almost surely, 2^18734491876 is an apocalyptic number.

18734491876 is the 136874-th square number.

It is an amenable number.

18734491876 is a deficient number, since it is larger than the sum of its proper divisors (14051347973).

18734491876 is an frugal number, since it uses more digits than its factorization.

18734491876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136878 (or 68439 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 58.

The spelling of 18734491876 in words is "eighteen billion, seven hundred thirty-four million, four hundred ninety-one thousand, eight hundred seventy-six".