21323201300 has 36 divisors (see below), whose sum is σ = 46695878460. Its totient is φ = 8451025920.

The previous prime is 21323201209. The next prime is 21323201311. The reversal of 21323201300 is 310232312.

It can be written as a sum of positive squares in 6 ways, for example, as 430811536 + 20892389764 = 20756^2 + 144542^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 967229 + ... + 989028.

It is an arithmetic number, because the mean of its divisors is an integer number (1297107735).

Almost surely, 2^21323201300 is an apocalyptic number.

21323201300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323201300 is an abundant number, since it is smaller than the sum of its proper divisors (25372677160).

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

21323201300 is a wasteful number, since it uses less digits than its factorization.

21323201300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956380 (or 1956373 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21323201300 its reverse (310232312), we get a palindrome (21633433612).

The spelling of 21323201300 in words is "twenty-one billion, three hundred twenty-three million, two hundred one thousand, three hundred".