200020019971 has 2 divisors, whose sum is σ = 200020019972. Its totient is φ = 200020019970.

The previous prime is 200020019957. The next prime is 200020020023. The reversal of 200020019971 is 179910020002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200020019971 - 2¹⁵ = 200019987203 is a prime.

It is not a weakly prime, because it can be changed into another prime (200020019921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010009985 + 100010009986.

It is an arithmetic number, because the mean of its divisors is an integer number (100010009986).

Almost surely, 2^200020019971 is an apocalyptic number.

200020019971 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020019971 is an equidigital number, since it uses as much as digits as its factorization.

200020019971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

Adding to 200020019971 its sum of digits (31), we get a palindrome (200020020002).

Adding to 200020019971 its reverse (179910020002), we get a palindrome (379930039973).

The spelling of 200020019971 in words is "two hundred billion, twenty million, nineteen thousand, nine hundred seventy-one".