18530225729 has 8 divisors (see below), whose sum is σ = 19171593000. Its totient is φ = 17889018112.

The previous prime is 18530225713. The next prime is 18530225737. The reversal of 18530225729 is 92752203581.

It can be written as a sum of positive squares in 4 ways, for example, as 13426552129 + 5103673600 = 115873^2 + 71440^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18530225729 - 2⁴ = 18530225713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18530225729.

It is not an unprimeable number, because it can be changed into a prime (18530225629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226457 + ... + 297225.

It is an arithmetic number, because the mean of its divisors is an integer number (2396449125).

Almost surely, 2^18530225729 is an apocalyptic number.

It is an amenable number.

18530225729 is a deficient number, since it is larger than the sum of its proper divisors (641367271).

18530225729 is an equidigital number, since it uses as much as digits as its factorization.

18530225729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79827.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 18530225729 in words is "eighteen billion, five hundred thirty million, two hundred twenty-five thousand, seven hundred twenty-nine".