21002324223 has 16 divisors (see below), whose sum is σ = 28491724800. Its totient is φ = 13757470080.

The previous prime is 21002324221. The next prime is 21002324227. The reversal of 21002324223 is 32242320012.

It is not a de Polignac number, because 21002324223 - 2¹ = 21002324221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21002324223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002324221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345543 + ... + 401751.

It is an arithmetic number, because the mean of its divisors is an integer number (1780732800).

Almost surely, 2^21002324223 is an apocalyptic number.

21002324223 is a deficient number, since it is larger than the sum of its proper divisors (7489400577).

21002324223 is a wasteful number, since it uses less digits than its factorization.

21002324223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58382.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21002324223 its reverse (32242320012), we get a palindrome (53244644235).

The spelling of 21002324223 in words is "twenty-one billion, two million, three hundred twenty-four thousand, two hundred twenty-three".