21033132533 has 8 divisors (see below), whose sum is σ = 24095238720. Its totient is φ = 17985369600.

The previous prime is 21033132503. The next prime is 21033132539. The reversal of 21033132533 is 33523133012.

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

It is a cyclic number.

It is not a de Polignac number, because 21033132533 - 2¹⁸ = 21032870389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033132539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3582668 + ... + 3588533.

It is an arithmetic number, because the mean of its divisors is an integer number (3011904840).

Almost surely, 2^21033132533 is an apocalyptic number.

It is an amenable number.

21033132533 is a deficient number, since it is larger than the sum of its proper divisors (3062106187).

21033132533 is an equidigital number, since it uses as much as digits as its factorization.

21033132533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7171627.

The product of its (nonzero) digits is 4860, while the sum is 26.

Adding to 21033132533 its reverse (33523133012), we get a palindrome (54556265545).

The spelling of 21033132533 in words is "twenty-one billion, thirty-three million, one hundred thirty-two thousand, five hundred thirty-three".