18516768435001 has 4 divisors (see below), whose sum is σ = 18558947862400. Its totient is φ = 18474589007604.

The previous prime is 18516768434959. The next prime is 18516768435007. The reversal of 18516768435001 is 10053486761581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18516768435001 - 2⁷ = 18516768434873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18516768435007) 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, 21089713041 + ... + 21089713918.

It is an arithmetic number, because the mean of its divisors is an integer number (4639736965600).

Almost surely, 2^{18516768435001} is an apocalyptic number.

It is an amenable number.

18516768435001 is a deficient number, since it is larger than the sum of its proper divisors (42179427399).

18516768435001 is an equidigital number, since it uses as much as digits as its factorization.

18516768435001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42179427398.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 18516768435001 in words is "eighteen trillion, five hundred sixteen billion, seven hundred sixty-eight million, four hundred thirty-five thousand, one".