18266513445 has 16 divisors (see below), whose sum is σ = 32473801920. Its totient is φ = 9742140432.

The previous prime is 18266513437. The next prime is 18266513467. The reversal of 18266513445 is 54431566281.

It is not a de Polignac number, because 18266513445 - 2³ = 18266513437 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18266513445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67653619 + ... + 67653888.

It is an arithmetic number, because the mean of its divisors is an integer number (2029612620).

Almost surely, 2^18266513445 is an apocalyptic number.

18266513445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18266513445 is a deficient number, since it is larger than the sum of its proper divisors (14207288475).

18266513445 is a wasteful number, since it uses less digits than its factorization.

18266513445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135307521 (or 135307515 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 18266513445 in words is "eighteen billion, two hundred sixty-six million, five hundred thirteen thousand, four hundred forty-five".