18446528089 has 4 divisors (see below), whose sum is σ = 20123485200. Its totient is φ = 16769570980.

The previous prime is 18446528077. The next prime is 18446528123. The reversal of 18446528089 is 98082564481.

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 not a de Polignac number, because 18446528089 - 2¹¹ = 18446526041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18446528069) 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, 838478539 + ... + 838478560.

It is an arithmetic number, because the mean of its divisors is an integer number (5030871300).

Almost surely, 2^18446528089 is an apocalyptic number.

It is an amenable number.

18446528089 is a deficient number, since it is larger than the sum of its proper divisors (1676957111).

18446528089 is a wasteful number, since it uses less digits than its factorization.

18446528089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676957110.

The product of its (nonzero) digits is 4423680, while the sum is 55.

It can be divided in two parts, 18446 and 528089, that added together give a triangular number (546535 = T₁₀₄₅).

The spelling of 18446528089 in words is "eighteen billion, four hundred forty-six million, five hundred twenty-eight thousand, eighty-nine".