18666880045 has 16 divisors (see below), whose sum is σ = 24541538112. Its totient is φ = 13517637760.

The previous prime is 18666880033. The next prime is 18666880079. The reversal of 18666880045 is 54008866681.

It is not a de Polignac number, because 18666880045 - 2²¹ = 18664782893 is a prime.

It is a super-2 number, since 2×18666880045² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18666879974 and 18666880001.

It is a congruent number.

It is an unprimeable number.

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, 715507 + ... + 741136.

It is an arithmetic number, because the mean of its divisors is an integer number (1533846132).

Almost surely, 2^18666880045 is an apocalyptic number.

It is an amenable number.

18666880045 is a deficient number, since it is larger than the sum of its proper divisors (5874658067).

18666880045 is a wasteful number, since it uses less digits than its factorization.

18666880045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456892.

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 18666880045 in words is "eighteen billion, six hundred sixty-six million, eight hundred eighty thousand, forty-five".