22541821729 has 4 divisors (see below), whose sum is σ = 25762081984. Its totient is φ = 19321561476.

The previous prime is 22541821697. The next prime is 22541821751. The reversal of 22541821729 is 92712814522.

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 not a de Polignac number, because 22541821729 - 2⁵ = 22541821697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22541821229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610130117 + ... + 1610130130.

It is an arithmetic number, because the mean of its divisors is an integer number (6440520496).

Almost surely, 2^22541821729 is an apocalyptic number.

It is an amenable number.

22541821729 is a deficient number, since it is larger than the sum of its proper divisors (3220260255).

22541821729 is an equidigital number, since it uses as much as digits as its factorization.

22541821729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220260254.

The product of its digits is 161280, while the sum is 43.

The spelling of 22541821729 in words is "twenty-two billion, five hundred forty-one million, eight hundred twenty-one thousand, seven hundred twenty-nine".