18473156203 has 2 divisors, whose sum is σ = 18473156204. Its totient is φ = 18473156202.

The previous prime is 18473156197. The next prime is 18473156243. The reversal of 18473156203 is 30265137481.

It is an a-pointer prime, because the next prime (18473156243) can be obtained adding 18473156203 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18473156203 - 2⁵ = 18473156171 is a prime.

It is not a weakly prime, because it can be changed into another prime (18473156243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9236578101 + 9236578102.

It is an arithmetic number, because the mean of its divisors is an integer number (9236578102).

Almost surely, 2^18473156203 is an apocalyptic number.

18473156203 is a deficient number, since it is larger than the sum of its proper divisors (1).

18473156203 is an equidigital number, since it uses as much as digits as its factorization.

18473156203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 18473156203 in words is "eighteen billion, four hundred seventy-three million, one hundred fifty-six thousand, two hundred three".