19979996803201 has 2 divisors, whose sum is σ = 19979996803202. Its totient is φ = 19979996803200.

The previous prime is 19979996803141. The next prime is 19979996803211. The reversal of 19979996803201 is 10230869997991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17770608870400 + 2209387932801 = 4215520^2 + 1486401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19979996803201 is a prime.

It is not a weakly prime, because it can be changed into another prime (19979996803211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9989998401600 + 9989998401601.

It is an arithmetic number, because the mean of its divisors is an integer number (9989998401601).

Almost surely, 2^{19979996803201} is an apocalyptic number.

It is an amenable number.

19979996803201 is a deficient number, since it is larger than the sum of its proper divisors (1).

19979996803201 is an equidigital number, since it uses as much as digits as its factorization.

19979996803201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119042784, while the sum is 73.

The spelling of 19979996803201 in words is "nineteen trillion, nine hundred seventy-nine billion, nine hundred ninety-six million, eight hundred three thousand, two hundred one".