20200020011971 has 2 divisors, whose sum is σ = 20200020011972. Its totient is φ = 20200020011970.

The previous prime is 20200020011957. The next prime is 20200020011987. The reversal of 20200020011971 is 17911002000202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20200020011971 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200020011911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100010005985 + 10100010005986.

It is an arithmetic number, because the mean of its divisors is an integer number (10100010005986).

Almost surely, 2^{20200020011971} is an apocalyptic number.

20200020011971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200020011971 is an equidigital number, since it uses as much as digits as its factorization.

20200020011971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 20200020011971 in words is "twenty trillion, two hundred billion, twenty million, eleven thousand, nine hundred seventy-one".