22147316828 has 72 divisors (see below), whose sum is σ = 48013765632. Its totient is φ = 8752491072.

The previous prime is 22147316827. The next prime is 22147316843. The reversal of 22147316828 is 82861374122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22147316827) 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, 6277601 + ... + 6281127.

It is an arithmetic number, because the mean of its divisors is an integer number (666857856).

Almost surely, 2^22147316828 is an apocalyptic number.

22147316828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22147316828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24006882816).

22147316828 is an abundant number, since it is smaller than the sum of its proper divisors (25866448804).

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

22147316828 is a wasteful number, since it uses less digits than its factorization.

22147316828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891 (or 4876 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The spelling of 22147316828 in words is "twenty-two billion, one hundred forty-seven million, three hundred sixteen thousand, eight hundred twenty-eight".