18473156225 has 6 divisors (see below), whose sum is σ = 22906713750. Its totient is φ = 14778524960.

The previous prime is 18473156203. The next prime is 18473156243. The reversal of 18473156225 is 52265137481.

It can be written as a sum of positive squares in 3 ways, for example, as 1249481104 + 17223675121 = 35348^2 + 131239^2 .

It is not a de Polignac number, because 18473156225 - 2⁶ = 18473156161 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 369463100 + ... + 369463149.

It is an arithmetic number, because the mean of its divisors is an integer number (3817785625).

Almost surely, 2^18473156225 is an apocalyptic number.

It is an amenable number.

18473156225 is a deficient number, since it is larger than the sum of its proper divisors (4433557525).

18473156225 is an equidigital number, since it uses as much as digits as its factorization.

18473156225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738926259 (or 738926254 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The spelling of 18473156225 in words is "eighteen billion, four hundred seventy-three million, one hundred fifty-six thousand, two hundred twenty-five".