21323013300 has 108 divisors (see below), whose sum is σ = 70767369036. Its totient is φ = 5351654400.

The previous prime is 21323013293. The next prime is 21323013323. The reversal of 21323013300 is 331032312.

21323013300 is a `hidden beast` number, since 2 + 1 + 32 + 301 + 330 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1107292176 + 20215721124 = 33276^2 + 142182^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 681531 + ... + 712130.

It is an arithmetic number, because the mean of its divisors is an integer number (655253417).

Almost surely, 2^21323013300 is an apocalyptic number.

21323013300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323013300 is an abundant number, since it is smaller than the sum of its proper divisors (49444355736).

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

21323013300 is a wasteful number, since it uses less digits than its factorization.

21323013300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393698 (or 1393688 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21323013300 its reverse (331032312), we get a palindrome (21654045612).

The spelling of 21323013300 in words is "twenty-one billion, three hundred twenty-three million, thirteen thousand, three hundred".