18306222780323 has 6 divisors (see below), whose sum is σ = 18704003992836. Its totient is φ = 17916728676452.

The previous prime is 18306222780319. The next prime is 18306222780337. The reversal of 18306222780323 is 32308722260381.

It is not a de Polignac number, because 18306222780323 - 2² = 18306222780319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18306222786323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4143552065 + ... + 4143556482.

It is an arithmetic number, because the mean of its divisors is an integer number (3117333998806).

Almost surely, 2^{18306222780323} is an apocalyptic number.

18306222780323 is a deficient number, since it is larger than the sum of its proper divisors (397781212513).

18306222780323 is an frugal number, since it uses more digits than its factorization.

18306222780323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8287108641 (or 8287108594 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 18306222780323 in words is "eighteen trillion, three hundred six billion, two hundred twenty-two million, seven hundred eighty thousand, three hundred twenty-three".