18351685001793 has 32 divisors (see below), whose sum is σ = 29289085902720. Its totient is φ = 10072966026240.

The previous prime is 18351685001761. The next prime is 18351685001809. The reversal of 18351685001793 is 39710058615381.

It is a happy number.

It is not a de Polignac number, because 18351685001793 - 2⁵ = 18351685001761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18351685005793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403541608 + ... + 403587081.

It is an arithmetic number, because the mean of its divisors is an integer number (915283934460).

Almost surely, 2^{18351685001793} is an apocalyptic number.

18351685001793 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18351685001793 is a deficient number, since it is larger than the sum of its proper divisors (10937400900927).

18351685001793 is a wasteful number, since it uses less digits than its factorization.

18351685001793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807128769.

The product of its (nonzero) digits is 5443200, while the sum is 57.

The spelling of 18351685001793 in words is "eighteen trillion, three hundred fifty-one billion, six hundred eighty-five million, one thousand, seven hundred ninety-three".