18351676749947 has 2 divisors, whose sum is σ = 18351676749948. Its totient is φ = 18351676749946.

The previous prime is 18351676749919. The next prime is 18351676750027. The reversal of 18351676749947 is 74994767615381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18351676749947 - 2⁶ = 18351676749883 is a prime.

It is not a weakly prime, because it can be changed into another prime (18351676743947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175838374973 + 9175838374974.

It is an arithmetic number, because the mean of its divisors is an integer number (9175838374974).

Almost surely, 2^{18351676749947} is an apocalyptic number.

18351676749947 is a deficient number, since it is larger than the sum of its proper divisors (1).

18351676749947 is an equidigital number, since it uses as much as digits as its factorization.

18351676749947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920360960, while the sum is 77.

The spelling of 18351676749947 in words is "eighteen trillion, three hundred fifty-one billion, six hundred seventy-six million, seven hundred forty-nine thousand, nine hundred forty-seven".