21110532533 has 4 divisors (see below), whose sum is σ = 21111464640. Its totient is φ = 21109600428.

The previous prime is 21110532511. The next prime is 21110532539. The reversal of 21110532533 is 33523501112.

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 21110532533 - 2¹² = 21110528437 is a prime.

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 (21110532539) 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 3 ways as a sum of consecutive naturals, for example, 431213 + ... + 477666.

It is an arithmetic number, because the mean of its divisors is an integer number (5277866160).

Almost surely, 2^21110532533 is an apocalyptic number.

It is an amenable number.

21110532533 is a deficient number, since it is larger than the sum of its proper divisors (932107).

21110532533 is an equidigital number, since it uses as much as digits as its factorization.

21110532533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932106.

The product of its (nonzero) digits is 2700, while the sum is 26.

The spelling of 21110532533 in words is "twenty-one billion, one hundred ten million, five hundred thirty-two thousand, five hundred thirty-three".