8020206861 has 8 divisors (see below), whose sum is σ = 10868914464. Its totient is φ = 5259151920.

The previous prime is 8020206851. The next prime is 8020206871. The reversal of 8020206861 is 1686020208.

It is an interprime number because it is at equal distance from previous prime (8020206851) and next prime (8020206871).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8020206861 - 2²¹ = 8018109709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8020206851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21912951 + ... + 21913316.

It is an arithmetic number, because the mean of its divisors is an integer number (1358614308).

Almost surely, 2^8020206861 is an apocalyptic number.

It is an amenable number.

8020206861 is a deficient number, since it is larger than the sum of its proper divisors (2848707603).

8020206861 is a wasteful number, since it uses less digits than its factorization.

8020206861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43826331.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 8020206861 is about 89555.6076468693. The cubic root of 8020206861 is about 2001.6824893013.

The spelling of 8020206861 in words is "eight billion, twenty million, two hundred six thousand, eight hundred sixty-one".