18971967103 has 2 divisors, whose sum is σ = 18971967104. Its totient is φ = 18971967102.

The previous prime is 18971967101. The next prime is 18971967121. The reversal of 18971967103 is 30176917981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18971967103 - 2¹ = 18971967101 is a prime.

Together with 18971967101, 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 (18971967101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9485983551 + 9485983552.

It is an arithmetic number, because the mean of its divisors is an integer number (9485983552).

Almost surely, 2^18971967103 is an apocalyptic number.

18971967103 is a deficient number, since it is larger than the sum of its proper divisors (1).

18971967103 is an equidigital number, since it uses as much as digits as its factorization.

18971967103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 52.

The spelling of 18971967103 in words is "eighteen billion, nine hundred seventy-one million, nine hundred sixty-seven thousand, one hundred three".