20021189682 has 96 divisors (see below), whose sum is σ = 44260819200. Its totient is φ = 6033134016.

The previous prime is 20021189647. The next prime is 20021189687. The reversal of 20021189682 is 28698112002.

It is a super-2 number, since 2×20021189682² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20021189682.

It is not an unprimeable number, because it can be changed into a prime (20021189687) 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, 22673613 + ... + 22674495.

It is an arithmetic number, because the mean of its divisors is an integer number (461050200).

Almost surely, 2^20021189682 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021189682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22130409600).

20021189682 is an abundant number, since it is smaller than the sum of its proper divisors (24239629518).

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

20021189682 is a wasteful number, since it uses less digits than its factorization.

20021189682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 20021189682 in words is "twenty billion, twenty-one million, one hundred eighty-nine thousand, six hundred eighty-two".