18368668535 has 16 divisors (see below), whose sum is σ = 25618291200. Its totient is φ = 12382171296.

The previous prime is 18368668523. The next prime is 18368668543. The reversal of 18368668535 is 53586686381.

It is a cyclic number.

It is not a de Polignac number, because 18368668535 - 2¹² = 18368664439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4445555 + ... + 4449684.

It is an arithmetic number, because the mean of its divisors is an integer number (1601143200).

Almost surely, 2^18368668535 is an apocalyptic number.

18368668535 is a deficient number, since it is larger than the sum of its proper divisors (7249622665).

18368668535 is an equidigital number, since it uses as much as digits as its factorization.

18368668535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8895310.

The product of its digits is 24883200, while the sum is 59.

The spelling of 18368668535 in words is "eighteen billion, three hundred sixty-eight million, six hundred sixty-eight thousand, five hundred thirty-five".