13817877993 has 8 divisors (see below), whose sum is σ = 20470930400. Its totient is φ = 9211918644.

The previous prime is 13817877989. The next prime is 13817878033. The reversal of 13817877993 is 39977871831.

It is not a de Polignac number, because 13817877993 - 2² = 13817877989 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 13817877993.

It is not an unprimeable number, because it can be changed into a prime (13817877793) 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 7 ways as a sum of consecutive naturals, for example, 255886603 + ... + 255886656.

It is an arithmetic number, because the mean of its divisors is an integer number (2558866300).

Almost surely, 2^13817877993 is an apocalyptic number.

It is an amenable number.

13817877993 is a deficient number, since it is larger than the sum of its proper divisors (6653052407).

13817877993 is an equidigital number, since it uses as much as digits as its factorization.

13817877993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511773268 (or 511773262 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 63.

The spelling of 13817877993 in words is "thirteen billion, eight hundred seventeen million, eight hundred seventy-seven thousand, nine hundred ninety-three".