21324424233 has 8 divisors (see below), whose sum is σ = 32494360768. Its totient is φ = 12185385264.

The previous prime is 21324424229. The next prime is 21324424241. The reversal of 21324424233 is 33242442312.

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

It is not a de Polignac number, because 21324424233 - 2² = 21324424229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21324424233.

It is not an unprimeable number, because it can be changed into a prime (21324424133) 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, 507724366 + ... + 507724407.

It is an arithmetic number, because the mean of its divisors is an integer number (4061795096).

Almost surely, 2^21324424233 is an apocalyptic number.

It is an amenable number.

21324424233 is a deficient number, since it is larger than the sum of its proper divisors (11169936535).

21324424233 is a wasteful number, since it uses less digits than its factorization.

21324424233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015448783.

The product of its digits is 27648, while the sum is 30.

Adding to 21324424233 its reverse (33242442312), we get a palindrome (54566866545).

The spelling of 21324424233 in words is "twenty-one billion, three hundred twenty-four million, four hundred twenty-four thousand, two hundred thirty-three".