8819821899 has 24 divisors (see below), whose sum is σ = 14570816000. Its totient is φ = 5036052528.

The previous prime is 8819821897. The next prime is 8819821919. The reversal of 8819821899 is 9981289188.

It is not a de Polignac number, because 8819821899 - 2¹ = 8819821897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8819821897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30852 + ... + 136350.

Almost surely, 2^8819821899 is an apocalyptic number.

8819821899 is a deficient number, since it is larger than the sum of its proper divisors (5750994101).

8819821899 is a wasteful number, since it uses less digits than its factorization.

8819821899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106839 (or 106836 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 63.

The square root of 8819821899 is about 93913.9068455785. The cubic root of 8819821899 is about 2066.1092012232.

The spelling of 8819821899 in words is "eight billion, eight hundred nineteen million, eight hundred twenty-one thousand, eight hundred ninety-nine".