20210085071 has 4 divisors (see below), whose sum is σ = 22047365544. Its totient is φ = 18372804600.

The previous prime is 20210085047. The next prime is 20210085089. The reversal of 20210085071 is 17058001202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20210085071 - 2²² = 20205890767 is a prime.

It is a super-3 number, since 3×20210085071³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20210085071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210085041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918640220 + ... + 918640241.

It is an arithmetic number, because the mean of its divisors is an integer number (5511841386).

Almost surely, 2^20210085071 is an apocalyptic number.

20210085071 is a deficient number, since it is larger than the sum of its proper divisors (1837280473).

20210085071 is a wasteful number, since it uses less digits than its factorization.

20210085071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837280472.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 20210085071 its reverse (17058001202), we get a palindrome (37268086273).

The spelling of 20210085071 in words is "twenty billion, two hundred ten million, eighty-five thousand, seventy-one".