21442341431 has 8 divisors (see below), whose sum is σ = 24506545440. Its totient is φ = 18378390528.

The previous prime is 21442341421. The next prime is 21442341469. The reversal of 21442341431 is 13414324412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21442341431 is a prime.

It is a super-2 number, since 2×21442341431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21442341394 and 21442341403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442341421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181295 + ... + 275231.

It is an arithmetic number, because the mean of its divisors is an integer number (3063318180).

Almost surely, 2^21442341431 is an apocalyptic number.

21442341431 is a deficient number, since it is larger than the sum of its proper divisors (3064204009).

21442341431 is an equidigital number, since it uses as much as digits as its factorization.

21442341431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126553.

The product of its digits is 9216, while the sum is 29.

Adding to 21442341431 its reverse (13414324412), we get a palindrome (34856665843).

The spelling of 21442341431 in words is "twenty-one billion, four hundred forty-two million, three hundred forty-one thousand, four hundred thirty-one".