18147428723 has 2 divisors, whose sum is σ = 18147428724. Its totient is φ = 18147428722.

The previous prime is 18147428701. The next prime is 18147428759. The reversal of 18147428723 is 32782474181.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18147428723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18147421723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9073714361 + 9073714362.

It is an arithmetic number, because the mean of its divisors is an integer number (9073714362).

Almost surely, 2^18147428723 is an apocalyptic number.

18147428723 is a deficient number, since it is larger than the sum of its proper divisors (1).

18147428723 is an equidigital number, since it uses as much as digits as its factorization.

18147428723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 602112, while the sum is 47.

The spelling of 18147428723 in words is "eighteen billion, one hundred forty-seven million, four hundred twenty-eight thousand, seven hundred twenty-three".