18353310377 has 4 divisors (see below), whose sum is σ = 18354709716. Its totient is φ = 18351911040.

The previous prime is 18353310373. The next prime is 18353310389. The reversal of 18353310377 is 77301335381.

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 15706104976 + 2647205401 = 125324^2 + 51451^2 .

It is a cyclic number.

It is not a de Polignac number, because 18353310377 - 2² = 18353310373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18353310373) 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, 679808 + ... + 706289.

It is an arithmetic number, because the mean of its divisors is an integer number (4588677429).

Almost surely, 2^18353310377 is an apocalyptic number.

It is an amenable number.

18353310377 is a deficient number, since it is larger than the sum of its proper divisors (1399339).

18353310377 is a wasteful number, since it uses less digits than its factorization.

18353310377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399338.

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 18353310377 in words is "eighteen billion, three hundred fifty-three million, three hundred ten thousand, three hundred seventy-seven".