18012787033 has 2 divisors, whose sum is σ = 18012787034. Its totient is φ = 18012787032.

The previous prime is 18012786971. The next prime is 18012787109. The reversal of 18012787033 is 33078721081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11490124864 + 6522662169 = 107192^2 + 80763^2 .

It is a cyclic number.

It is not a de Polignac number, because 18012787033 - 2³³ = 9422852441 is a prime.

It is a super-3 number, since 3×18012787033³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18012782033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006393516 + 9006393517.

It is an arithmetic number, because the mean of its divisors is an integer number (9006393517).

Almost surely, 2^18012787033 is an apocalyptic number.

It is an amenable number.

18012787033 is a deficient number, since it is larger than the sum of its proper divisors (1).

18012787033 is an equidigital number, since it uses as much as digits as its factorization.

18012787033 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 40.

The spelling of 18012787033 in words is "eighteen billion, twelve million, seven hundred eighty-seven thousand, thirty-three".