21323210000 has 50 divisors (see below), whose sum is σ = 51625647942. Its totient is φ = 8529280000.

The previous prime is 21323209997. The next prime is 21323210003. The reversal of 21323210000 is 1232312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21323209997) and next prime (21323210003).

It can be written as a sum of positive squares in 5 ways, for example, as 4309659904 + 17013550096 = 65648^2 + 130436^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is not an unprimeable number, because it can be changed into a prime (21323210003) 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 9 ways as a sum of consecutive naturals, for example, 1056161 + ... + 1076160.

Almost surely, 2^21323210000 is an apocalyptic number.

21323210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323210000 is an abundant number, since it is smaller than the sum of its proper divisors (30302437942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323210000 is an equidigital number, since it uses as much as digits as its factorization.

21323210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132349 (or 2132328 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21323210000 its reverse (1232312), we get a palindrome (21324442312).

The spelling of 21323210000 in words is "twenty-one billion, three hundred twenty-three million, two hundred ten thousand".