21033624433 has 8 divisors (see below), whose sum is σ = 21258417152. Its totient is φ = 20808994176.

The previous prime is 21033624371. The next prime is 21033624461. The reversal of 21033624433 is 33442633012.

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 21033624433 - 2⁹ = 21033623921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033624395 and 21033624404.

It is not an unprimeable number, because it can be changed into a prime (21033624233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229216 + ... + 307582.

It is an arithmetic number, because the mean of its divisors is an integer number (2657302144).

Almost surely, 2^21033624433 is an apocalyptic number.

It is an amenable number.

21033624433 is a deficient number, since it is larger than the sum of its proper divisors (224792719).

21033624433 is an equidigital number, since it uses as much as digits as its factorization.

21033624433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81231.

The product of its (nonzero) digits is 31104, while the sum is 31.

The spelling of 21033624433 in words is "twenty-one billion, thirty-three million, six hundred twenty-four thousand, four hundred thirty-three".