18207866880 has 720 divisors, whose sum is σ = 76126327200. Its totient is φ = 4161798144.

The previous prime is 18207866861. The next prime is 18207866899. The reversal of 18207866880 is 8866870281.

It is an interprime number because it is at equal distance from previous prime (18207866861) and next prime (18207866899).

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 3360 × 2016 × 2688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2601123837 + ... + 2601123843.

It is an arithmetic number, because the mean of its divisors is an integer number (105731010).

Almost surely, 2^18207866880 is an apocalyptic number.

18207866880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18207866880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38063163600).

18207866880 is an abundant number, since it is smaller than the sum of its proper divisors (57918460320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18207866880 is an frugal number, since it uses more digits than its factorization.

18207866880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 18207866880 in words is "eighteen billion, two hundred seven million, eight hundred sixty-six thousand, eight hundred eighty".