18749317739 has 2 divisors, whose sum is σ = 18749317740. Its totient is φ = 18749317738.

The previous prime is 18749317693. The next prime is 18749317747. The reversal of 18749317739 is 93771394781.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18749317739 is a prime.

It is not a weakly prime, because it can be changed into another prime (18749317039) 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, 9374658869 + 9374658870.

It is an arithmetic number, because the mean of its divisors is an integer number (9374658870).

Almost surely, 2^18749317739 is an apocalyptic number.

18749317739 is a deficient number, since it is larger than the sum of its proper divisors (1).

18749317739 is an equidigital number, since it uses as much as digits as its factorization.

18749317739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504, while the sum is 59.

The spelling of 18749317739 in words is "eighteen billion, seven hundred forty-nine million, three hundred seventeen thousand, seven hundred thirty-nine".