19990597072 has 40 divisors (see below), whose sum is σ = 40780380960. Its totient is φ = 9466888320.

The previous prime is 19990597049. The next prime is 19990597073. The reversal of 19990597072 is 27079509991.

It is a super-3 number, since 3×19990597072³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19990596998 and 19990597016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19990597073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2282622 + ... + 2291362.

It is an arithmetic number, because the mean of its divisors is an integer number (1019509524).

Almost surely, 2^19990597072 is an apocalyptic number.

It is an amenable number.

19990597072 is an abundant number, since it is smaller than the sum of its proper divisors (20789783888).

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

19990597072 is a wasteful number, since it uses less digits than its factorization.

19990597072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16291 (or 16285 counting only the distinct ones).

The product of its (nonzero) digits is 3214890, while the sum is 58.

The spelling of 19990597072 in words is "nineteen billion, nine hundred ninety million, five hundred ninety-seven thousand, seventy-two".