8020944921 has 48 divisors (see below), whose sum is σ = 12012134400. Its totient is φ = 4755754080.

The previous prime is 8020944917. The next prime is 8020944931. The reversal of 8020944921 is 1294490208.

It is not a de Polignac number, because 8020944921 - 2² = 8020944917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8020944921.

It is not an unprimeable number, because it can be changed into a prime (8020944931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5117880 + ... + 5119446.

It is an arithmetic number, because the mean of its divisors is an integer number (250252800).

Almost surely, 2^8020944921 is an apocalyptic number.

It is an amenable number.

8020944921 is a deficient number, since it is larger than the sum of its proper divisors (3991189479).

8020944921 is a wasteful number, since it uses less digits than its factorization.

8020944921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 8020944921 is about 89559.7282320575. The cubic root of 8020944921 is about 2001.7438890668.

The spelling of 8020944921 in words is "eight billion, twenty million, nine hundred forty-four thousand, nine hundred twenty-one".