21442111452533 has 4 divisors (see below), whose sum is σ = 21442559115648. Its totient is φ = 21441663789420.

The previous prime is 21442111452497. The next prime is 21442111452607. The reversal of 21442111452533 is 33525411124412.

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 21442111452533 - 2¹⁴ = 21442111436149 is a prime.

It is a super-2 number, since 2×21442111452533² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442111442533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223759703 + ... + 223855508.

It is an arithmetic number, because the mean of its divisors is an integer number (5360639778912).

Almost surely, 2^{21442111452533} is an apocalyptic number.

It is an amenable number.

21442111452533 is a deficient number, since it is larger than the sum of its proper divisors (447663115).

21442111452533 is an equidigital number, since it uses as much as digits as its factorization.

21442111452533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447663114.

The product of its digits is 115200, while the sum is 38.

Adding to 21442111452533 its reverse (33525411124412), we get a palindrome (54967522576945).

The spelling of 21442111452533 in words is "twenty-one trillion, four hundred forty-two billion, one hundred eleven million, four hundred fifty-two thousand, five hundred thirty-three".