18347957362947 has 4 divisors (see below), whose sum is σ = 24463943150600. Its totient is φ = 12231971575296.

The previous prime is 18347957362921. The next prime is 18347957362951. The reversal of 18347957362947 is 74926375974381.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18347957362947 - 2¹⁵ = 18347957330179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18347957362907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3057992893822 + ... + 3057992893827.

It is an arithmetic number, because the mean of its divisors is an integer number (6115985787650).

Almost surely, 2^{18347957362947} is an apocalyptic number.

18347957362947 is a deficient number, since it is larger than the sum of its proper divisors (6115985787653).

18347957362947 is an equidigital number, since it uses as much as digits as its factorization.

18347957362947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6115985787652.

The product of its digits is 1920360960, while the sum is 75.

The spelling of 18347957362947 in words is "eighteen trillion, three hundred forty-seven billion, nine hundred fifty-seven million, three hundred sixty-two thousand, nine hundred forty-seven".