18402194016563 has 8 divisors (see below), whose sum is σ = 21031343137632. Its totient is φ = 15773110960896.

The previous prime is 18402194016539. The next prime is 18402194016587. The reversal of 18402194016563 is 36561049120481.

It is an interprime number because it is at equal distance from previous prime (18402194016539) and next prime (18402194016587).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18402194016563 - 2⁸ = 18402194016307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18402194016263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15918020 + ... + 17034897.

It is an arithmetic number, because the mean of its divisors is an integer number (2628917892204).

Almost surely, 2^{18402194016563} is an apocalyptic number.

18402194016563 is a deficient number, since it is larger than the sum of its proper divisors (2629149121069).

18402194016563 is an equidigital number, since it uses as much as digits as its factorization.

18402194016563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33032701.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 18402194016563 in words is "eighteen trillion, four hundred two billion, one hundred ninety-four million, sixteen thousand, five hundred sixty-three".