18266266623 has 16 divisors (see below), whose sum is σ = 26575906176. Its totient is φ = 11067635040.

The previous prime is 18266266621. The next prime is 18266266633. The reversal of 18266266623 is 32666266281.

It is not a de Polignac number, because 18266266623 - 2¹ = 18266266621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18266266621) 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 15 ways as a sum of consecutive naturals, for example, 64165 + ... + 201617.

It is an arithmetic number, because the mean of its divisors is an integer number (1660994136).

Almost surely, 2^18266266623 is an apocalyptic number.

18266266623 is a deficient number, since it is larger than the sum of its proper divisors (8309639553).

18266266623 is a wasteful number, since it uses less digits than its factorization.

18266266623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141494.

The product of its digits is 1492992, while the sum is 48.

The spelling of 18266266623 in words is "eighteen billion, two hundred sixty-six million, two hundred sixty-six thousand, six hundred twenty-three".