18945222283 has 24 divisors (see below), whose sum is σ = 21316791600. Its totient is φ = 16809496704.

The previous prime is 18945222269. The next prime is 18945222299. The reversal of 18945222283 is 38222254981.

It is a de Polignac number, because none of the positive numbers 2^k-18945222283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18945222203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1104013 + ... + 1121041.

It is an arithmetic number, because the mean of its divisors is an integer number (888199650).

Almost surely, 2^18945222283 is an apocalyptic number.

18945222283 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18945222283 is a deficient number, since it is larger than the sum of its proper divisors (2371569317).

18945222283 is a wasteful number, since it uses less digits than its factorization.

18945222283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17311 (or 17298 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The spelling of 18945222283 in words is "eighteen billion, nine hundred forty-five million, two hundred twenty-two thousand, two hundred eighty-three".