18345663357 has 32 divisors (see below), whose sum is σ = 28951680000. Its totient is φ = 10326731184.

The previous prime is 18345663341. The next prime is 18345663367. The reversal of 18345663357 is 75336654381.

It is not a de Polignac number, because 18345663357 - 2⁴ = 18345663341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345663317) 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, 64107 + ... + 201992.

It is an arithmetic number, because the mean of its divisors is an integer number (904740000).

Almost surely, 2^18345663357 is an apocalyptic number.

It is an amenable number.

18345663357 is a deficient number, since it is larger than the sum of its proper divisors (10606016643).

18345663357 is an equidigital number, since it uses as much as digits as its factorization.

18345663357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266190 (or 266176 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 51.

The spelling of 18345663357 in words is "eighteen billion, three hundred forty-five million, six hundred sixty-three thousand, three hundred fifty-seven".