18093928777 has 4 divisors (see below), whose sum is σ = 18096661636. Its totient is φ = 18091195920.

The previous prime is 18093928759. The next prime is 18093928807. The reversal of 18093928777 is 77782939081.

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 9478190736 + 8615738041 = 97356^2 + 92821^2 .

It is a cyclic number.

It is not a de Polignac number, because 18093928777 - 2⁷ = 18093928649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18093928747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1356474 + ... + 1369747.

It is an arithmetic number, because the mean of its divisors is an integer number (4524165409).

Almost surely, 2^18093928777 is an apocalyptic number.

It is an amenable number.

18093928777 is a deficient number, since it is larger than the sum of its proper divisors (2732859).

18093928777 is an equidigital number, since it uses as much as digits as its factorization.

18093928777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732858.

The product of its (nonzero) digits is 10668672, while the sum is 61.

The spelling of 18093928777 in words is "eighteen billion, ninety-three million, nine hundred twenty-eight thousand, seven hundred seventy-seven".