18765386880 has 64 divisors (see below), whose sum is σ = 59814676800. Its totient is φ = 5004102656.

The previous prime is 18765386839. The next prime is 18765386911. The reversal of 18765386880 is 8868356781.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×18765386880² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 7 ways as a sum of consecutive naturals, for example, 4884900 + ... + 4888739.

It is an arithmetic number, because the mean of its divisors is an integer number (934604325).

Almost surely, 2^18765386880 is an apocalyptic number.

18765386880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18765386880 is an abundant number, since it is smaller than the sum of its proper divisors (41049289920).

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

18765386880 is an equidigital number, since it uses as much as digits as its factorization.

18765386880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9773661 (or 9773649 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 18765386880 in words is "eighteen billion, seven hundred sixty-five million, three hundred eighty-six thousand, eight hundred eighty".