18090808416 has 144 divisors (see below), whose sum is σ = 52994541600. Its totient is φ = 5849708544.

The previous prime is 18090808367. The next prime is 18090808423. The reversal of 18090808416 is 61480809081.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3823140 + ... + 3827868.

It is an arithmetic number, because the mean of its divisors is an integer number (368017650).

Almost surely, 2^18090808416 is an apocalyptic number.

18090808416 is a gapful number since it is divisible by the number (16) 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 18090808416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26497270800).

18090808416 is an abundant number, since it is smaller than the sum of its proper divisors (34903733184).

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

18090808416 is a wasteful number, since it uses less digits than its factorization.

18090808416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141 (or 5130 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 18090808416 in words is "eighteen billion, ninety million, eight hundred eight thousand, four hundred sixteen".