15914321920 has 384 divisors, whose sum is σ = 46702656000. Its totient is φ = 5192613888.

The previous prime is 15914321893. The next prime is 15914321953. The reversal of 15914321920 is 2912341951.

It is a self number, because there is not a number n which added to its sum of digits gives 15914321920.

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 31 ways as a sum of consecutive naturals, for example, 80783262 + ... + 80783458.

It is an arithmetic number, because the mean of its divisors is an integer number (121621500).

Almost surely, 2^15914321920 is an apocalyptic number.

15914321920 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 15914321920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23351328000).

15914321920 is an abundant number, since it is smaller than the sum of its proper divisors (30788334080).

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

15914321920 is an equidigital number, since it uses as much as digits as its factorization.

15914321920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 15914321920 in words is "fifteen billion, nine hundred fourteen million, three hundred twenty-one thousand, nine hundred twenty".