19963998180073 has 4 divisors (see below), whose sum is σ = 19964156797008. Its totient is φ = 19963839563140.

The previous prime is 19963998180043. The next prime is 19963998180127. The reversal of 19963998180073 is 37008189936991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19963998180073 - 2⁵ = 19963998180041 is a prime.

It is a super-2 number, since 2×19963998180073² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19963998179978 and 19963998180005.

It is not an unprimeable number, because it can be changed into a prime (19963998180043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79119523 + ... + 79371448.

It is an arithmetic number, because the mean of its divisors is an integer number (4991039199252).

Almost surely, 2^{19963998180073} is an apocalyptic number.

It is an amenable number.

19963998180073 is a deficient number, since it is larger than the sum of its proper divisors (158616935).

19963998180073 is a wasteful number, since it uses less digits than its factorization.

19963998180073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158616934.

The product of its (nonzero) digits is 158723712, while the sum is 73.

The spelling of 19963998180073 in words is "nineteen trillion, nine hundred sixty-three billion, nine hundred ninety-eight million, one hundred eighty thousand, seventy-three".