21323002324 has 24 divisors (see below), whose sum is σ = 40289001480. Its totient is φ = 9816077184.

The previous prime is 21323002319. The next prime is 21323002331. The reversal of 21323002324 is 42320032312.

It can be written as a sum of positive squares in 4 ways, for example, as 103836100 + 21219166224 = 10190^2 + 145668^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21323002295 and 21323002304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506839 + ... + 547294.

It is an arithmetic number, because the mean of its divisors is an integer number (1678708395).

Almost surely, 2^21323002324 is an apocalyptic number.

It is an amenable number.

21323002324 is a deficient number, since it is larger than the sum of its proper divisors (18965999156).

21323002324 is a wasteful number, since it uses less digits than its factorization.

21323002324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054539 (or 1054537 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21323002324 its reverse (42320032312), we get a palindrome (63643034636).

The spelling of 21323002324 in words is "twenty-one billion, three hundred twenty-three million, two thousand, three hundred twenty-four".