18278207089 has 8 divisors (see below), whose sum is σ = 19230073128. Its totient is φ = 17350439040.

The previous prime is 18278207083. The next prime is 18278207141. The reversal of 18278207089 is 98070287281.

It can be written as a sum of positive squares in 4 ways, for example, as 3763600 + 18274443489 = 1940^2 + 135183^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-18278207089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18278207083) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6022942 + ... + 6025975.

It is an arithmetic number, because the mean of its divisors is an integer number (2403759141).

Almost surely, 2^18278207089 is an apocalyptic number.

It is an amenable number.

18278207089 is a deficient number, since it is larger than the sum of its proper divisors (951866039).

18278207089 is a wasteful number, since it uses less digits than its factorization.

18278207089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12048995.

The product of its (nonzero) digits is 903168, while the sum is 52.

The spelling of 18278207089 in words is "eighteen billion, two hundred seventy-eight million, two hundred seven thousand, eighty-nine".