18147322939 has 2 divisors, whose sum is σ = 18147322940. Its totient is φ = 18147322938.

The previous prime is 18147322931. The next prime is 18147322957. The reversal of 18147322939 is 93922374181.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18147322939 - 2³ = 18147322931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18147322892 and 18147322901.

It is not a weakly prime, because it can be changed into another prime (18147322931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9073661469 + 9073661470.

It is an arithmetic number, because the mean of its divisors is an integer number (9073661470).

Almost surely, 2^18147322939 is an apocalyptic number.

18147322939 is a deficient number, since it is larger than the sum of its proper divisors (1).

18147322939 is an equidigital number, since it uses as much as digits as its factorization.

18147322939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The spelling of 18147322939 in words is "eighteen billion, one hundred forty-seven million, three hundred twenty-two thousand, nine hundred thirty-nine".