13221930840 has 128 divisors (see below), whose sum is σ = 40022588160. Its totient is φ = 3494260224.

The previous prime is 13221930833. The next prime is 13221930847. The reversal of 13221930840 is 4803912231.

It is an interprime number because it is at equal distance from previous prime (13221930833) and next prime (13221930847).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221930847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10304839 + ... + 10306121.

It is an arithmetic number, because the mean of its divisors is an integer number (312676470).

Almost surely, 2^13221930840 is an apocalyptic number.

13221930840 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 13221930840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20011294080).

13221930840 is an abundant number, since it is smaller than the sum of its proper divisors (26800657320).

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

13221930840 is a wasteful number, since it uses less digits than its factorization.

13221930840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001 (or 1997 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 13221930840 in words is "thirteen billion, two hundred twenty-one million, nine hundred thirty thousand, eight hundred forty".