18339225920 has 56 divisors (see below), whose sum is σ = 43735303944. Its totient is φ = 7324768256.

The previous prime is 18339225917. The next prime is 18339225967. The reversal of 18339225920 is 2952293381.

It can be written as a sum of positive squares in 4 ways, for example, as 2688215104 + 15651010816 = 51848^2 + 125104^2 .

It is a congruent number.

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, 174314 + ... + 258966.

Almost surely, 2^18339225920 is an apocalyptic number.

18339225920 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 18339225920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21867651972).

18339225920 is an abundant number, since it is smaller than the sum of its proper divisors (25396078024).

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

18339225920 is an equidigital number, since it uses as much as digits as its factorization.

18339225920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85347 (or 85337 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 18339225920 in words is "eighteen billion, three hundred thirty-nine million, two hundred twenty-five thousand, nine hundred twenty".