18463456433 has 2 divisors, whose sum is σ = 18463456434. Its totient is φ = 18463456432.

The previous prime is 18463456391. The next prime is 18463456523. The reversal of 18463456433 is 33465436481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16628876209 + 1834580224 = 128953^2 + 42832^2 .

It is an emirp because it is prime and its reverse (33465436481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18463456433 - 2²⁰ = 18462407857 is a prime.

It is not a weakly prime, because it can be changed into another prime (18463456633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9231728216 + 9231728217.

It is an arithmetic number, because the mean of its divisors is an integer number (9231728217).

Almost surely, 2^18463456433 is an apocalyptic number.

It is an amenable number.

18463456433 is a deficient number, since it is larger than the sum of its proper divisors (1).

18463456433 is an equidigital number, since it uses as much as digits as its factorization.

18463456433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 47.

The spelling of 18463456433 in words is "eighteen billion, four hundred sixty-three million, four hundred fifty-six thousand, four hundred thirty-three".