18473156243 has 2 divisors, whose sum is σ = 18473156244. Its totient is φ = 18473156242.

The previous prime is 18473156203. The next prime is 18473156249. The reversal of 18473156243 is 34265137481.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34265137481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18473156243 - 2³⁴ = 1293287059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18473156194 and 18473156203.

It is not a weakly prime, because it can be changed into another prime (18473156249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9236578121 + 9236578122.

It is an arithmetic number, because the mean of its divisors is an integer number (9236578122).

Almost surely, 2^18473156243 is an apocalyptic number.

18473156243 is a deficient number, since it is larger than the sum of its proper divisors (1).

18473156243 is an equidigital number, since it uses as much as digits as its factorization.

18473156243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 44.

The spelling of 18473156243 in words is "eighteen billion, four hundred seventy-three million, one hundred fifty-six thousand, two hundred forty-three".