8005188021 has 16 divisors (see below), whose sum is σ = 11606889024. Its totient is φ = 4887108864.

The previous prime is 8005187959. The next prime is 8005188041. The reversal of 8005188021 is 1208815008.

It is not a de Polignac number, because 8005188021 - 2¹¹ = 8005185973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8005188041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2119255 + ... + 2123028.

It is an arithmetic number, because the mean of its divisors is an integer number (725430564).

Almost surely, 2^8005188021 is an apocalyptic number.

It is an amenable number.

8005188021 is a deficient number, since it is larger than the sum of its proper divisors (3601701003).

8005188021 is a wasteful number, since it uses less digits than its factorization.

8005188021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242340.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 8005188021 is about 89471.7163186222. The cubic root of 8005188021 is about 2000.4322416602.

The spelling of 8005188021 in words is "eight billion, five million, one hundred eighty-eight thousand, twenty-one".