18516848103937 has 8 divisors (see below), whose sum is σ = 18648100353960. Its totient is φ = 18385874227200.

The previous prime is 18516848103913. The next prime is 18516848103983. The reversal of 18516848103937 is 73930184861581.

It can be written as a sum of positive squares in 4 ways, for example, as 5508592067521 + 13008256036416 = 2347039^2 + 3606696^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18516848103937 - 2¹⁹ = 18516847579649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18516848100937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69459814 + ... + 69725887.

It is an arithmetic number, because the mean of its divisors is an integer number (2331012544245).

Almost surely, 2^{18516848103937} is an apocalyptic number.

It is an amenable number.

18516848103937 is a deficient number, since it is larger than the sum of its proper divisors (131252250023).

18516848103937 is a wasteful number, since it uses less digits than its factorization.

18516848103937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139186643.

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 18516848103937 in words is "eighteen trillion, five hundred sixteen billion, eight hundred forty-eight million, one hundred three thousand, nine hundred thirty-seven".