18768250705 has 4 divisors (see below), whose sum is σ = 22521900852. Its totient is φ = 15014600560.

The previous prime is 18768250693. The next prime is 18768250727. The reversal of 18768250705 is 50705286781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8798627601 + 9969623104 = 93801^2 + 99848^2 .

It is not a de Polignac number, because 18768250705 - 2¹³ = 18768242513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1876825066 + ... + 1876825075.

It is an arithmetic number, because the mean of its divisors is an integer number (5630475213).

Almost surely, 2^18768250705 is an apocalyptic number.

It is an amenable number.

18768250705 is a deficient number, since it is larger than the sum of its proper divisors (3753650147).

18768250705 is an equidigital number, since it uses as much as digits as its factorization.

18768250705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753650146.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 18768250705 in words is "eighteen billion, seven hundred sixty-eight million, two hundred fifty thousand, seven hundred five".