19720165075996 has 36 divisors (see below), whose sum is σ = 43351767860464. Its totient is φ = 7683181197120.

The previous prime is 19720165075957. The next prime is 19720165076047. The reversal of 19720165075996 is 69957056102791.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2910292521 + ... + 2910299296.

Almost surely, 2^{19720165075996} is an apocalyptic number.

It is an amenable number.

19720165075996 is an abundant number, since it is smaller than the sum of its proper divisors (23631602784468).

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

19720165075996 is a wasteful number, since it uses less digits than its factorization.

19720165075996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5820591850 (or 5820591837 counting only the distinct ones).

The product of its (nonzero) digits is 64297800, while the sum is 67.

The spelling of 19720165075996 in words is "nineteen trillion, seven hundred twenty billion, one hundred sixty-five million, seventy-five thousand, nine hundred ninety-six".