18506450788013 has 8 divisors (see below), whose sum is σ = 19321873468800. Its totient is φ = 17691927639408.

The previous prime is 18506450788003. The next prime is 18506450788019. The reversal of 18506450788013 is 31088705460581.

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 18506450788013 - 2⁴ = 18506450787997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18506450788013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18506450788019) 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, 224840993 + ... + 224923286.

It is an arithmetic number, because the mean of its divisors is an integer number (2415234183600).

Almost surely, 2^{18506450788013} is an apocalyptic number.

It is an amenable number.

18506450788013 is a deficient number, since it is larger than the sum of its proper divisors (815422680787).

18506450788013 is a wasteful number, since it uses less digits than its factorization.

18506450788013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449766091.

The product of its (nonzero) digits is 6451200, while the sum is 56.

The spelling of 18506450788013 in words is "eighteen trillion, five hundred six billion, four hundred fifty million, seven hundred eighty-eight thousand, thirteen".