18687333457103 has 2 divisors, whose sum is σ = 18687333457104. Its totient is φ = 18687333457102.

The previous prime is 18687333457099. The next prime is 18687333457129. The reversal of 18687333457103 is 30175433378681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18687333457103 - 2² = 18687333457099 is a prime.

It is a super-2 number, since 2×18687333457103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18687333457153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9343666728551 + 9343666728552.

It is an arithmetic number, because the mean of its divisors is an integer number (9343666728552).

Almost surely, 2^{18687333457103} is an apocalyptic number.

18687333457103 is a deficient number, since it is larger than the sum of its proper divisors (1).

18687333457103 is an equidigital number, since it uses as much as digits as its factorization.

18687333457103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 18687333457103 in words is "eighteen trillion, six hundred eighty-seven billion, three hundred thirty-three million, four hundred fifty-seven thousand, one hundred three".