19800772320 has 96 divisors (see below), whose sum is σ = 71282792448. Its totient is φ = 4525890048.

The previous prime is 19800772319. The next prime is 19800772331. The reversal of 19800772320 is 2327700891.

It is a tau number, because it is divible by the number of its divisors (96).

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, 2943184 + ... + 2949903.

It is an arithmetic number, because the mean of its divisors is an integer number (742529088).

Almost surely, 2^19800772320 is an apocalyptic number.

19800772320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19800772320 is an abundant number, since it is smaller than the sum of its proper divisors (51482020128).

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

19800772320 is a wasteful number, since it uses less digits than its factorization.

19800772320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893112 (or 5893104 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 19800772320 in words is "nineteen billion, eight hundred million, seven hundred seventy-two thousand, three hundred twenty".