20824024321 has 4 divisors (see below), whose sum is σ = 20824326144. Its totient is φ = 20823722500.

The previous prime is 20824024259. The next prime is 20824024327. The reversal of 20824024321 is 12342042802.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20824024321 - 2²⁹ = 20287153409 is a prime.

It is a super-2 number, since 2×20824024321² (a number of 21 digits) contains 22 as substring.

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 20824024321.

It is not an unprimeable number, because it can be changed into a prime (20824024327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9216 + ... + 204286.

It is an arithmetic number, because the mean of its divisors is an integer number (5206081536).

Almost surely, 2^20824024321 is an apocalyptic number.

It is an amenable number.

20824024321 is a deficient number, since it is larger than the sum of its proper divisors (301823).

20824024321 is a wasteful number, since it uses less digits than its factorization.

20824024321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301822.

The product of its (nonzero) digits is 6144, while the sum is 28.

The spelling of 20824024321 in words is "twenty billion, eight hundred twenty-four million, twenty-four thousand, three hundred twenty-one".