8256020109 has 4 divisors (see below), whose sum is σ = 11008026816. Its totient is φ = 5504013404.

The previous prime is 8256020107. The next prime is 8256020147. The reversal of 8256020109 is 9010206528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8256020109 - 2¹ = 8256020107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8256020109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8256020107) 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, 1376003349 + ... + 1376003354.

It is an arithmetic number, because the mean of its divisors is an integer number (2752006704).

Almost surely, 2^8256020109 is an apocalyptic number.

It is an amenable number.

8256020109 is a deficient number, since it is larger than the sum of its proper divisors (2752006707).

8256020109 is a wasteful number, since it uses less digits than its factorization.

8256020109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752006706.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 8256020109 is about 90862.6441889075. The cubic root of 8256020109 is about 2021.1113798097. Note that the first 3 decimals are identical.

The spelling of 8256020109 in words is "eight billion, two hundred fifty-six million, twenty thousand, one hundred nine".