13918305573 has 10 divisors (see below), whose sum is σ = 20791543014. Its totient is φ = 9278870328.

The previous prime is 13918305553. The next prime is 13918305587. The reversal of 13918305573 is 37550381931.

13918305573 is a `hidden beast` number, since 1 + 3 + 91 + 8 + 3 + 0 + 557 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9911795364 + 4006510209 = 99558^2 + 63297^2 .

It is not a de Polignac number, because 13918305573 - 2²¹ = 13916208421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13918305553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 85915386 + ... + 85915547.

Almost surely, 2^13918305573 is an apocalyptic number.

It is an amenable number.

13918305573 is a deficient number, since it is larger than the sum of its proper divisors (6873237441).

13918305573 is an equidigital number, since it uses as much as digits as its factorization.

13918305573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171830945 (or 171830936 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 13918305573 in words is "thirteen billion, nine hundred eighteen million, three hundred five thousand, five hundred seventy-three".