19220772320 has 96 divisors (see below), whose sum is σ = 45944563392. Its totient is φ = 7597965312.

The previous prime is 19220772301. The next prime is 19220772367. The reversal of 19220772320 is 2327702291.

It is a Cunningham number, because it is equal to 138639²-1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11090174 + ... + 11091906.

It is an arithmetic number, because the mean of its divisors is an integer number (478589202).

Almost surely, 2^19220772320 is an apocalyptic number.

19220772320 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 19220772320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22972281696).

19220772320 is an abundant number, since it is smaller than the sum of its proper divisors (26723791072).

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

19220772320 is a wasteful number, since it uses less digits than its factorization.

19220772320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524 (or 2516 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 19220772320 in words is "nineteen billion, two hundred twenty million, seven hundred seventy-two thousand, three hundred twenty".