18481223029 has 2 divisors, whose sum is σ = 18481223030. Its totient is φ = 18481223028.

The previous prime is 18481223023. The next prime is 18481223063. The reversal of 18481223029 is 92032218481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10505840004 + 7975383025 = 102498^2 + 89305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18481223029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18481222982 and 18481223000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18481223023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9240611514 + 9240611515.

It is an arithmetic number, because the mean of its divisors is an integer number (9240611515).

Almost surely, 2^18481223029 is an apocalyptic number.

It is an amenable number.

18481223029 is a deficient number, since it is larger than the sum of its proper divisors (1).

18481223029 is an equidigital number, since it uses as much as digits as its factorization.

18481223029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 18481223029 in words is "eighteen billion, four hundred eighty-one million, two hundred twenty-three thousand, twenty-nine".