19990034330161 has 12 divisors (see below), whose sum is σ = 23356152683568. Its totient is φ = 17058833566152.

The previous prime is 19990034330159. The next prime is 19990034330179. The reversal of 19990034330161 is 16103343009991.

It is not a de Polignac number, because 19990034330161 - 2¹ = 19990034330159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19990034330111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 898578931 + ... + 898601176.

It is an arithmetic number, because the mean of its divisors is an integer number (1946346056964).

Almost surely, 2^{19990034330161} is an apocalyptic number.

It is an amenable number.

19990034330161 is a deficient number, since it is larger than the sum of its proper divisors (3366118353407).

19990034330161 is a wasteful number, since it uses less digits than its factorization.

19990034330161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797180348 (or 1797180341 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 49.

The spelling of 19990034330161 in words is "nineteen trillion, nine hundred ninety billion, thirty-four million, three hundred thirty thousand, one hundred sixty-one".