18321277355 has 8 divisors (see below), whose sum is σ = 21987739872. Its totient is φ = 14655550528.

The previous prime is 18321277333. The next prime is 18321277391. The reversal of 18321277355 is 55377212381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18321277355 - 2¹⁰ = 18321276331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127562 + ... + 230031.

It is an arithmetic number, because the mean of its divisors is an integer number (2748467484).

Almost surely, 2^18321277355 is an apocalyptic number.

18321277355 is a deficient number, since it is larger than the sum of its proper divisors (3666462517).

18321277355 is a wasteful number, since it uses less digits than its factorization.

18321277355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367845.

The product of its digits is 352800, while the sum is 44.

The spelling of 18321277355 in words is "eighteen billion, three hundred twenty-one million, two hundred seventy-seven thousand, three hundred fifty-five".