21030133320 has 96 divisors (see below), whose sum is σ = 78111933120. Its totient is φ = 4806887040.

The previous prime is 21030133303. The next prime is 21030133379. The reversal of 21030133320 is 2333103012.

21030133320 is a `hidden beast` number, since 2 + 10 + 301 + 33 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21030133293 and 21030133302.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4170126 + ... + 4175165.

It is an arithmetic number, because the mean of its divisors is an integer number (813665970).

Almost surely, 2^21030133320 is an apocalyptic number.

21030133320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21030133320 is an abundant number, since it is smaller than the sum of its proper divisors (57081799800).

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

21030133320 is a wasteful number, since it uses less digits than its factorization.

21030133320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8345315 (or 8345308 counting only the distinct ones).

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

Adding to 21030133320 its reverse (2333103012), we get a palindrome (23363236332).

The spelling of 21030133320 in words is "twenty-one billion, thirty million, one hundred thirty-three thousand, three hundred twenty".