21442544334235 has 4 divisors (see below), whose sum is σ = 25731053201088. Its totient is φ = 17154035467384.

The previous prime is 21442544334217. The next prime is 21442544334247. The reversal of 21442544334235 is 53243344524412.

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

It is a cyclic number.

It is not a de Polignac number, because 21442544334235 - 2¹³ = 21442544326043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144254433419 + ... + 2144254433428.

It is an arithmetic number, because the mean of its divisors is an integer number (6432763300272).

Almost surely, 2^{21442544334235} is an apocalyptic number.

21442544334235 is a deficient number, since it is larger than the sum of its proper divisors (4288508866853).

21442544334235 is an equidigital number, since it uses as much as digits as its factorization.

21442544334235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288508866852.

The product of its digits is 5529600, while the sum is 46.

Adding to 21442544334235 its reverse (53243344524412), we get a palindrome (74685888858647).

The spelling of 21442544334235 in words is "twenty-one trillion, four hundred forty-two billion, five hundred forty-four million, three hundred thirty-four thousand, two hundred thirty-five".