20000199999971 has 2 divisors, whose sum is σ = 20000199999972. Its totient is φ = 20000199999970.

The previous prime is 20000199999961. The next prime is 20000200000103. The reversal of 20000199999971 is 17999999100002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20000199999971 - 2¹⁴ = 20000199983587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000199999898 and 20000199999907.

It is not a weakly prime, because it can be changed into another prime (20000199999961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000099999985 + 10000099999986.

It is an arithmetic number, because the mean of its divisors is an integer number (10000099999986).

Almost surely, 2^{20000199999971} is an apocalyptic number.

20000199999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000199999971 is an equidigital number, since it uses as much as digits as its factorization.

20000199999971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7440174, while the sum is 65.

The spelling of 20000199999971 in words is "twenty trillion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-one".