18252635473 has 4 divisors (see below), whose sum is σ = 18283416228. Its totient is φ = 18221854720.

The previous prime is 18252635461. The next prime is 18252635491. The reversal of 18252635473 is 37453625281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13935094209 + 4317541264 = 118047^2 + 65708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18252635473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18252335473) 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 in 3 ways as a sum of consecutive naturals, for example, 15389488 + ... + 15390673.

It is an arithmetic number, because the mean of its divisors is an integer number (4570854057).

Almost surely, 2^18252635473 is an apocalyptic number.

It is an amenable number.

18252635473 is a deficient number, since it is larger than the sum of its proper divisors (30780755).

18252635473 is an equidigital number, since it uses as much as digits as its factorization.

18252635473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30780754.

The product of its digits is 1209600, while the sum is 46.

The spelling of 18252635473 in words is "eighteen billion, two hundred fifty-two million, six hundred thirty-five thousand, four hundred seventy-three".