18910986345103 has 2 divisors, whose sum is σ = 18910986345104. Its totient is φ = 18910986345102.

The previous prime is 18910986345101. The next prime is 18910986345137. The reversal of 18910986345103 is 30154368901981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18910986345103 - 2¹ = 18910986345101 is a prime.

Together with 18910986345101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18910986345101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9455493172551 + 9455493172552.

It is an arithmetic number, because the mean of its divisors is an integer number (9455493172552).

Almost surely, 2^{18910986345103} is an apocalyptic number.

18910986345103 is a deficient number, since it is larger than the sum of its proper divisors (1).

18910986345103 is an equidigital number, since it uses as much as digits as its factorization.

18910986345103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 18910986345103 in words is "eighteen trillion, nine hundred ten billion, nine hundred eighty-six million, three hundred forty-five thousand, one hundred three".