18635956345 has 16 divisors (see below), whose sum is σ = 22625471232. Its totient is φ = 14734463040.

The previous prime is 18635956337. The next prime is 18635956349. The reversal of 18635956345 is 54365953681.

It is not a de Polignac number, because 18635956345 - 2³ = 18635956337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18635956349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223075 + ... + 295015.

It is an arithmetic number, because the mean of its divisors is an integer number (1414091952).

Almost surely, 2^18635956345 is an apocalyptic number.

It is an amenable number.

18635956345 is a deficient number, since it is larger than the sum of its proper divisors (3989514887).

18635956345 is a wasteful number, since it uses less digits than its factorization.

18635956345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72552.

The product of its digits is 11664000, while the sum is 55.

The spelling of 18635956345 in words is "eighteen billion, six hundred thirty-five million, nine hundred fifty-six thousand, three hundred forty-five".