21323303120 has 40 divisors (see below), whose sum is σ = 56659064064. Its totient is φ = 7310846592.

The previous prime is 21323303101. The next prime is 21323303129. The reversal of 21323303120 is 2130332312.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21323303092 and 21323303101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323303129) 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, 19038104 + ... + 19039223.

Almost surely, 2^21323303120 is an apocalyptic number.

21323303120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323303120 is an abundant number, since it is smaller than the sum of its proper divisors (35335760944).

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

21323303120 is a wasteful number, since it uses less digits than its factorization.

21323303120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38077347 (or 38077341 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21323303120 its reverse (2130332312), we get a palindrome (23453635432).

The spelling of 21323303120 in words is "twenty-one billion, three hundred twenty-three million, three hundred three thousand, one hundred twenty".