18672188503 has 2 divisors, whose sum is σ = 18672188504. Its totient is φ = 18672188502.

The previous prime is 18672188413. The next prime is 18672188581. The reversal of 18672188503 is 30588127681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18672188503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18672188203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9336094251 + 9336094252.

It is an arithmetic number, because the mean of its divisors is an integer number (9336094252).

Almost surely, 2^18672188503 is an apocalyptic number.

18672188503 is a deficient number, since it is larger than the sum of its proper divisors (1).

18672188503 is an equidigital number, since it uses as much as digits as its factorization.

18672188503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 18672188503 in words is "eighteen billion, six hundred seventy-two million, one hundred eighty-eight thousand, five hundred three".