18713691776 has 96 divisors (see below), whose sum is σ = 40511753100. Its totient is φ = 8606687232.

The previous prime is 18713691751. The next prime is 18713691833. The reversal of 18713691776 is 67719631781.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3088691776 + 15625000000 = 55576^2 + 125000^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6855980 + ... + 6858708.

Almost surely, 2^18713691776 is an apocalyptic number.

18713691776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18713691776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20255876550).

18713691776 is an abundant number, since it is smaller than the sum of its proper divisors (21798061324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18713691776 is a wasteful number, since it uses less digits than its factorization.

18713691776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086 (or 3061 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 56.

The spelling of 18713691776 in words is "eighteen billion, seven hundred thirteen million, six hundred ninety-one thousand, seven hundred seventy-six".