18034153321 has 2 divisors, whose sum is σ = 18034153322. Its totient is φ = 18034153320.

The previous prime is 18034153253. The next prime is 18034153339. The reversal of 18034153321 is 12335143081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17556250000 + 477903321 = 132500^2 + 21861^2 .

It is a cyclic number.

It is not a de Polignac number, because 18034153321 - 2²¹ = 18032056169 is a prime.

It is not a weakly prime, because it can be changed into another prime (18034154321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9017076660 + 9017076661.

It is an arithmetic number, because the mean of its divisors is an integer number (9017076661).

Almost surely, 2^18034153321 is an apocalyptic number.

It is an amenable number.

18034153321 is a deficient number, since it is larger than the sum of its proper divisors (1).

18034153321 is an equidigital number, since it uses as much as digits as its factorization.

18034153321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 18034153321 in words is "eighteen billion, thirty-four million, one hundred fifty-three thousand, three hundred twenty-one".