21323240001 has 12 divisors (see below), whose sum is σ = 35200269312. Its totient is φ = 12184708536.

The previous prime is 21323239939. The next prime is 21323240011. The reversal of 21323240001 is 10004232312.

It is not a de Polignac number, because 21323240001 - 2⁹ = 21323239489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21323240011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169232001 + ... + 169232126.

It is an arithmetic number, because the mean of its divisors is an integer number (2933355776).

Almost surely, 2^21323240001 is an apocalyptic number.

21323240001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21323240001 is a deficient number, since it is larger than the sum of its proper divisors (13877029311).

21323240001 is a wasteful number, since it uses less digits than its factorization.

21323240001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338464140 (or 338464137 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21323240001 its reverse (10004232312), we get a palindrome (31327472313).

The spelling of 21323240001 in words is "twenty-one billion, three hundred twenty-three million, two hundred forty thousand, one".