21033223293 has 8 divisors (see below), whose sum is σ = 29693962368. Its totient is φ = 13197316544.

The previous prime is 21033223291. The next prime is 21033223297. The reversal of 21033223293 is 39232233012.

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 21033223293 - 2¹ = 21033223291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21033223293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033223291) 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, 206208021 + ... + 206208122.

It is an arithmetic number, because the mean of its divisors is an integer number (3711745296).

Almost surely, 2^21033223293 is an apocalyptic number.

It is an amenable number.

21033223293 is a deficient number, since it is larger than the sum of its proper divisors (8660739075).

21033223293 is a wasteful number, since it uses less digits than its factorization.

21033223293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412416163.

The product of its (nonzero) digits is 11664, while the sum is 30.

The spelling of 21033223293 in words is "twenty-one billion, thirty-three million, two hundred twenty-three thousand, two hundred ninety-three".