18236680320 has 384 divisors, whose sum is σ = 62284904640. Its totient is φ = 4537294848.

The previous prime is 18236680303. The next prime is 18236680331. The reversal of 18236680320 is 2308663281.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 57528802 + ... + 57529118.

Almost surely, 2^18236680320 is an apocalyptic number.

18236680320 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 18236680320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31142452320).

18236680320 is an abundant number, since it is smaller than the sum of its proper divisors (44048224320).

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

18236680320 is a wasteful number, since it uses less digits than its factorization.

18236680320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 18236680320 in words is "eighteen billion, two hundred thirty-six million, six hundred eighty thousand, three hundred twenty".