22181840382 has 32 divisors (see below), whose sum is σ = 48249321120. Its totient is φ = 6757603200.

The previous prime is 22181840381. The next prime is 22181840411. The reversal of 22181840382 is 28304818122.

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 22181840382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22181840381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399957 + ... + 1415712.

It is an arithmetic number, because the mean of its divisors is an integer number (1507791285).

Almost surely, 2^22181840382 is an apocalyptic number.

22181840382 is an abundant number, since it is smaller than the sum of its proper divisors (26067480738).

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

22181840382 is a wasteful number, since it uses less digits than its factorization.

22181840382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815788.

The product of its (nonzero) digits is 49152, while the sum is 39.

The spelling of 22181840382 in words is "twenty-two billion, one hundred eighty-one million, eight hundred forty thousand, three hundred eighty-two".