21530514244041 has 16 divisors (see below), whose sum is σ = 34796790697920. Its totient is φ = 13048796511360.

The previous prime is 21530514244039. The next prime is 21530514244061. The reversal of 21530514244041 is 14044241503512.

21530514244041 is a `hidden beast` number, since 2 + 1 + 5 + 30 + 5 + 142 + 440 + 41 = 666.

It is not a de Polignac number, because 21530514244041 - 2¹ = 21530514244039 is a prime.

It is a super-2 number, since 2×21530514244041² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21530514243987 and 21530514244005.

It is not an unprimeable number, because it can be changed into a prime (21530514244061) 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 15 ways as a sum of consecutive naturals, for example, 36246656680 + ... + 36246657273.

It is an arithmetic number, because the mean of its divisors is an integer number (2174799418620).

Almost surely, 2^{21530514244041} is an apocalyptic number.

It is an amenable number.

21530514244041 is a deficient number, since it is larger than the sum of its proper divisors (13266276453879).

21530514244041 is a wasteful number, since it uses less digits than its factorization.

21530514244041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72493313973 (or 72493313967 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 21530514244041 its reverse (14044241503512), we get a palindrome (35574755747553).

The spelling of 21530514244041 in words is "twenty-one trillion, five hundred thirty billion, five hundred fourteen million, two hundred forty-four thousand, forty-one".