8219916894 has 96 divisors (see below), whose sum is σ = 19693618560. Its totient is φ = 2279285568.

The previous prime is 8219916889. The next prime is 8219916949. The reversal of 8219916894 is 4986199128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2058652 + ... + 2062640.

It is an arithmetic number, because the mean of its divisors is an integer number (205141860).

Almost surely, 2^8219916894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8219916894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9846809280).

8219916894 is an abundant number, since it is smaller than the sum of its proper divisors (11473701666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8219916894 is a wasteful number, since it uses less digits than its factorization.

8219916894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214 (or 4207 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 57.

The square root of 8219916894 is about 90663.7573344498. The cubic root of 8219916894 is about 2018.1609977558.

The spelling of 8219916894 in words is "eight billion, two hundred nineteen million, nine hundred sixteen thousand, eight hundred ninety-four".