22330781382 has 64 divisors (see below), whose sum is σ = 55177436160. Its totient is φ = 5867005824.

The previous prime is 22330781311. The next prime is 22330781383. The reversal of 22330781382 is 28318703322.

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 22330781382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22330781383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65844 + ... + 221352.

It is an arithmetic number, because the mean of its divisors is an integer number (862147440).

Almost surely, 2^22330781382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22330781382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27588718080).

22330781382 is an abundant number, since it is smaller than the sum of its proper divisors (32846654778).

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

22330781382 is a wasteful number, since it uses less digits than its factorization.

22330781382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155797.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 22330781382 in words is "twenty-two billion, three hundred thirty million, seven hundred eighty-one thousand, three hundred eighty-two".