19720852320 has 96 divisors (see below), whose sum is σ = 66899220192. Its totient is φ = 4854362112.

The previous prime is 19720852301. The next prime is 19720852331. The reversal of 19720852320 is 2325802791.

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

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 1573957 + ... + 1586436.

It is an arithmetic number, because the mean of its divisors is an integer number (696866877).

Almost surely, 2^19720852320 is an apocalyptic number.

19720852320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19720852320 is an abundant number, since it is smaller than the sum of its proper divisors (47178367872).

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

19720852320 is a wasteful number, since it uses less digits than its factorization.

19720852320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160424 (or 3160416 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 19720852320 in words is "nineteen billion, seven hundred twenty million, eight hundred fifty-two thousand, three hundred twenty".