18975217873 has 2 divisors, whose sum is σ = 18975217874. Its totient is φ = 18975217872.

The previous prime is 18975217871. The next prime is 18975217883. The reversal of 18975217873 is 37871257981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18937062544 + 38155329 = 137612^2 + 6177^2 .

It is a cyclic number.

It is not a de Polignac number, because 18975217873 - 2¹ = 18975217871 is a prime.

Together with 18975217871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18975217871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9487608936 + 9487608937.

It is an arithmetic number, because the mean of its divisors is an integer number (9487608937).

Almost surely, 2^18975217873 is an apocalyptic number.

It is an amenable number.

18975217873 is a deficient number, since it is larger than the sum of its proper divisors (1).

18975217873 is an equidigital number, since it uses as much as digits as its factorization.

18975217873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5927040, while the sum is 58.

The spelling of 18975217873 in words is "eighteen billion, nine hundred seventy-five million, two hundred seventeen thousand, eight hundred seventy-three".