18440717033 has 2 divisors, whose sum is σ = 18440717034. Its totient is φ = 18440717032.

The previous prime is 18440716999. The next prime is 18440717059. The reversal of 18440717033 is 33071704481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15378976144 + 3061740889 = 124012^2 + 55333^2 .

It is a cyclic number.

It is not a de Polignac number, because 18440717033 - 2¹⁰ = 18440716009 is a prime.

It is not a weakly prime, because it can be changed into another prime (18440717063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9220358516 + 9220358517.

It is an arithmetic number, because the mean of its divisors is an integer number (9220358517).

Almost surely, 2^18440717033 is an apocalyptic number.

It is an amenable number.

18440717033 is a deficient number, since it is larger than the sum of its proper divisors (1).

18440717033 is an equidigital number, since it uses as much as digits as its factorization.

18440717033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 18440717033 in words is "eighteen billion, four hundred forty million, seven hundred seventeen thousand, thirty-three".