18887875916603 has 4 divisors (see below), whose sum is σ = 18887884747560. Its totient is φ = 18887867085648.

The previous prime is 18887875916573. The next prime is 18887875916641. The reversal of 18887875916603 is 30661957878881.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18887875916603 is a prime.

It is a super-2 number, since 2×18887875916603² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18887875976603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1037576 + ... + 6233162.

It is an arithmetic number, because the mean of its divisors is an integer number (4721971186890).

Almost surely, 2^{18887875916603} is an apocalyptic number.

18887875916603 is a deficient number, since it is larger than the sum of its proper divisors (8830957).

18887875916603 is an equidigital number, since it uses as much as digits as its factorization.

18887875916603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830956.

The product of its (nonzero) digits is 975421440, while the sum is 77.

The spelling of 18887875916603 in words is "eighteen trillion, eight hundred eighty-seven billion, eight hundred seventy-five million, nine hundred sixteen thousand, six hundred three".