21442525434345 has 16 divisors (see below), whose sum is σ = 34308797418432. Its totient is φ = 11435761323840.

The previous prime is 21442525434287. The next prime is 21442525434349. The reversal of 21442525434345 is 54343452524412.

It is not a de Polignac number, because 21442525434345 - 2¹⁰ = 21442525433321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21442525434294 and 21442525434303.

It is not an unprimeable number, because it can be changed into a prime (21442525434349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15061326 + ... + 16423415.

It is an arithmetic number, because the mean of its divisors is an integer number (2144299838652).

Almost surely, 2^{21442525434345} is an apocalyptic number.

It is an amenable number.

21442525434345 is a deficient number, since it is larger than the sum of its proper divisors (12866271984087).

21442525434345 is a wasteful number, since it uses less digits than its factorization.

21442525434345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31530152.

The product of its digits is 9216000, while the sum is 48.

Adding to 21442525434345 its reverse (54343452524412), we get a palindrome (75785977958757).

The spelling of 21442525434345 in words is "twenty-one trillion, four hundred forty-two billion, five hundred twenty-five million, four hundred thirty-four thousand, three hundred forty-five".