18147322943 has 16 divisors (see below), whose sum is σ = 19131759360. Its totient is φ = 17179489536.

The previous prime is 18147322939. The next prime is 18147322957. The reversal of 18147322943 is 34922374181.

It is a Cunningham number, because it is equal to 134712²-1.

It is a cyclic number.

It is not a de Polignac number, because 18147322943 - 2² = 18147322939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18147322894 and 18147322903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18147322043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3095471 + ... + 3101327.

It is an arithmetic number, because the mean of its divisors is an integer number (1195734960).

Almost surely, 2^18147322943 is an apocalyptic number.

18147322943 is a deficient number, since it is larger than the sum of its proper divisors (984436417).

18147322943 is a wasteful number, since it uses less digits than its factorization.

18147322943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246.

The product of its digits is 290304, while the sum is 44.

The spelling of 18147322943 in words is "eighteen billion, one hundred forty-seven million, three hundred twenty-two thousand, nine hundred forty-three".