8021768084 has 18 divisors (see below), whose sum is σ = 15430302762. Its totient is φ = 3646258000.

The previous prime is 8021768011. The next prime is 8021768093. The reversal of 8021768084 is 4808671208.

It can be written as a sum of positive squares in only one way, i.e., 6017415184 + 2004352900 = 77572^2 + 44770^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8286467 + ... + 8287434.

Almost surely, 2^8021768084 is an apocalyptic number.

It is an amenable number.

8021768084 is a deficient number, since it is larger than the sum of its proper divisors (7408534678).

8021768084 is a wasteful number, since it uses less digits than its factorization.

8021768084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16573927 (or 16573914 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 8021768084 is about 89564.3237232326. The cubic root of 8021768084 is about 2001.8123641720.

The spelling of 8021768084 in words is "eight billion, twenty-one million, seven hundred sixty-eight thousand, eighty-four".