18284451329 has 4 divisors (see below), whose sum is σ = 18515900160. Its totient is φ = 18053002500.

The previous prime is 18284451319. The next prime is 18284451343. The reversal of 18284451329 is 92315448281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18284451329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18284451319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115724297 + ... + 115724454.

It is an arithmetic number, because the mean of its divisors is an integer number (4628975040).

Almost surely, 2^18284451329 is an apocalyptic number.

It is an amenable number.

18284451329 is a deficient number, since it is larger than the sum of its proper divisors (231448831).

18284451329 is an equidigital number, since it uses as much as digits as its factorization.

18284451329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231448830.

The product of its digits is 552960, while the sum is 47.

The spelling of 18284451329 in words is "eighteen billion, two hundred eighty-four million, four hundred fifty-one thousand, three hundred twenty-nine".