20211567071 has 2 divisors, whose sum is σ = 20211567072. Its totient is φ = 20211567070.

The previous prime is 20211567043. The next prime is 20211567113. The reversal of 20211567071 is 17076511202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211567071 - 2⁶ = 20211567007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211567011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105783535 + 10105783536.

It is an arithmetic number, because the mean of its divisors is an integer number (10105783536).

Almost surely, 2^20211567071 is an apocalyptic number.

20211567071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211567071 is an equidigital number, since it uses as much as digits as its factorization.

20211567071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 32.

The spelling of 20211567071 in words is "twenty billion, two hundred eleven million, five hundred sixty-seven thousand, seventy-one".