18260383488 has 72 divisors (see below), whose sum is σ = 48656095488. Its totient is φ = 6079675392.

The previous prime is 18260383481. The next prime is 18260383507. The reversal of 18260383488 is 88438306281.

It is a happy number.

It is a super-2 number, since 2×18260383488² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18260383488.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18260383481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664681 + ... + 691607.

It is an arithmetic number, because the mean of its divisors is an integer number (675779104).

Almost surely, 2^18260383488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18260383488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24328047744).

18260383488 is an abundant number, since it is smaller than the sum of its proper divisors (30395712000).

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

18260383488 is an equidigital number, since it uses as much as digits as its factorization.

18260383488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27829 (or 27815 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 51.

The spelling of 18260383488 in words is "eighteen billion, two hundred sixty million, three hundred eighty-three thousand, four hundred eighty-eight".