22181234689 has 4 divisors (see below), whose sum is σ = 22183326724. Its totient is φ = 22179142656.

The previous prime is 22181234683. The next prime is 22181234693. The reversal of 22181234689 is 98643218122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1325542464 + 20855692225 = 36408^2 + 144415^2 .

It is a cyclic number.

It is not a de Polignac number, because 22181234689 - 2²¹ = 22179137537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22181234683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030032 + ... + 1051345.

It is an arithmetic number, because the mean of its divisors is an integer number (5545831681).

Almost surely, 2^22181234689 is an apocalyptic number.

It is an amenable number.

22181234689 is a deficient number, since it is larger than the sum of its proper divisors (2092035).

22181234689 is a wasteful number, since it uses less digits than its factorization.

22181234689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092034.

The product of its digits is 331776, while the sum is 46.

The spelling of 22181234689 in words is "twenty-two billion, one hundred eighty-one million, two hundred thirty-four thousand, six hundred eighty-nine".