323504000021 has 8 divisors (see below), whose sum is σ = 329751718200. Its totient is φ = 317261610432.

The previous prime is 323504000011. The next prime is 323504000047. The reversal of 323504000021 is 120000405323.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4460904100 + 319043095921 = 66790^2 + 564839^2 .

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 323504000021 - 2¹⁴ = 323503983637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 323503999957 and 323504000002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323504000011) 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, 1209446 + ... + 1452503.

It is an arithmetic number, because the mean of its divisors is an integer number (41218964775).

Almost surely, 2^323504000021 is an apocalyptic number.

It is an amenable number.

323504000021 is a deficient number, since it is larger than the sum of its proper divisors (6247718179).

323504000021 is a wasteful number, since it uses less digits than its factorization.

323504000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664295.

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 323504000021 its reverse (120000405323), we get a palindrome (443504405344).

The spelling of 323504000021 in words is "three hundred twenty-three billion, five hundred four million, twenty-one", and thus it is an aban number.