18664100200503 has 32 divisors (see below), whose sum is σ = 28064098195200. Its totient is φ = 12256634462688.

The previous prime is 18664100200381. The next prime is 18664100200541. The reversal of 18664100200503 is 30500200146681.

It is a happy number.

18664100200503 is a `hidden beast` number, since 1 + 8 + 6 + 641 + 0 + 0 + 2 + 0 + 0 + 5 + 0 + 3 = 666.

It is not a de Polignac number, because 18664100200503 - 2⁹ = 18664100199991 is a prime.

It is a super-2 number, since 2×18664100200503² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18664100200703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64260933 + ... + 64550721.

It is an arithmetic number, because the mean of its divisors is an integer number (877003068600).

Almost surely, 2^{18664100200503} is an apocalyptic number.

18664100200503 is a deficient number, since it is larger than the sum of its proper divisors (9399997994697).

18664100200503 is a wasteful number, since it uses less digits than its factorization.

18664100200503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325468 (or 325462 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 18664100200503 in words is "eighteen trillion, six hundred sixty-four billion, one hundred million, two hundred thousand, five hundred three".