18229235473 has 4 divisors (see below), whose sum is σ = 19301543460. Its totient is φ = 17156927488.

The previous prime is 18229235471. The next prime is 18229235501. The reversal of 18229235473 is 37453292281.

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 7728519744 + 10500715729 = 87912^2 + 102473^2 .

It is a cyclic number.

It is not a de Polignac number, because 18229235473 - 2¹ = 18229235471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18229235471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536153968 + ... + 536154001.

It is an arithmetic number, because the mean of its divisors is an integer number (4825385865).

Almost surely, 2^18229235473 is an apocalyptic number.

It is an amenable number.

18229235473 is a deficient number, since it is larger than the sum of its proper divisors (1072307987).

18229235473 is a wasteful number, since it uses less digits than its factorization.

18229235473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072307986.

The product of its digits is 725760, while the sum is 46.

The spelling of 18229235473 in words is "eighteen billion, two hundred twenty-nine million, two hundred thirty-five thousand, four hundred seventy-three".