21441031252533 has 12 divisors (see below), whose sum is σ = 30970434153100. Its totient is φ = 14293995137856.

The previous prime is 21441031252477. The next prime is 21441031252549. The reversal of 21441031252533 is 33525213014412.

21441031252533 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 103 + 12 + 5 + 2 + 533 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17917425478404 + 3523605774129 = 4232898^2 + 1877127^2 .

It is not a de Polignac number, because 21441031252533 - 2¹⁶ = 21441031186997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441031252133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4100535 + ... + 7726347.

Almost surely, 2^{21441031252533} is an apocalyptic number.

It is an amenable number.

21441031252533 is a deficient number, since it is larger than the sum of its proper divisors (9529402900567).

21441031252533 is a wasteful number, since it uses less digits than its factorization.

21441031252533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282868 (or 4282865 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 21441031252533 its reverse (33525213014412), we get a palindrome (54966244266945).

The spelling of 21441031252533 in words is "twenty-one trillion, four hundred forty-one billion, thirty-one million, two hundred fifty-two thousand, five hundred thirty-three".