22065043861 has 4 divisors (see below), whose sum is σ = 25217192992. Its totient is φ = 18912894732.

The previous prime is 22065043853. The next prime is 22065043867. The reversal of 22065043861 is 16834056022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22065043861 - 2³ = 22065043853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22065043861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22065043867) 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, 1576074555 + ... + 1576074568.

It is an arithmetic number, because the mean of its divisors is an integer number (6304298248).

Almost surely, 2^22065043861 is an apocalyptic number.

It is an amenable number.

22065043861 is a deficient number, since it is larger than the sum of its proper divisors (3152149131).

22065043861 is an equidigital number, since it uses as much as digits as its factorization.

22065043861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152149130.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 22065043861 its reverse (16834056022), we get a palindrome (38899099883).

The spelling of 22065043861 in words is "twenty-two billion, sixty-five million, forty-three thousand, eight hundred sixty-one".