21094164882 has 96 divisors (see below), whose sum is σ = 54849144960. Its totient is φ = 5886548640.

The previous prime is 21094164881. The next prime is 21094164887. The reversal of 21094164882 is 28846149012.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21094164881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 683832 + ... + 714012.

It is an arithmetic number, because the mean of its divisors is an integer number (571345260).

Almost surely, 2^21094164882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21094164882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27424572480).

21094164882 is an abundant number, since it is smaller than the sum of its proper divisors (33754980078).

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

21094164882 is a wasteful number, since it uses less digits than its factorization.

21094164882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30285 (or 30236 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 21094164882 in words is "twenty-one billion, ninety-four million, one hundred sixty-four thousand, eight hundred eighty-two".