18527780080 has 80 divisors (see below), whose sum is σ = 45784926720. Its totient is φ = 6952829184.

The previous prime is 18527780069. The next prime is 18527780087. The reversal of 18527780080 is 8008772581.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 18527780080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18527780087) 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, 97389 + ... + 215731.

It is an arithmetic number, because the mean of its divisors is an integer number (572311584).

Almost surely, 2^18527780080 is an apocalyptic number.

18527780080 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 18527780080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22892463360).

18527780080 is an abundant number, since it is smaller than the sum of its proper divisors (27257146640).

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

18527780080 is a wasteful number, since it uses less digits than its factorization.

18527780080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118478 (or 118472 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 46.

The spelling of 18527780080 in words is "eighteen billion, five hundred twenty-seven million, seven hundred eighty thousand, eighty".