21203330020 has 24 divisors (see below), whose sum is σ = 44612152704. Its totient is φ = 8465111136.

The previous prime is 21203329993. The next prime is 21203330023. The reversal of 21203330020 is 2003330212.

It is a super-3 number, since 3×21203330020³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203329976 and 21203330003.

It is not an unprimeable number, because it can be changed into a prime (21203330023) 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 7 ways as a sum of consecutive naturals, for example, 1003084 + ... + 1024003.

It is an arithmetic number, because the mean of its divisors is an integer number (1858839696).

Almost surely, 2^21203330020 is an apocalyptic number.

21203330020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203330020 is an abundant number, since it is smaller than the sum of its proper divisors (23408822684).

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

21203330020 is a wasteful number, since it uses less digits than its factorization.

21203330020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027619 (or 2027617 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21203330020 its reverse (2003330212), we get a palindrome (23206660232).

The spelling of 21203330020 in words is "twenty-one billion, two hundred three million, three hundred thirty thousand, twenty".