21233310020 has 48 divisors (see below), whose sum is σ = 48115710720. Its totient is φ = 7824356736.

The previous prime is 21233309971. The next prime is 21233310047. The reversal of 21233310020 is 2001333212.

It is a super-3 number, since 3×21233310020³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49601 + ... + 211959.

It is an arithmetic number, because the mean of its divisors is an integer number (1002410640).

Almost surely, 2^21233310020 is an apocalyptic number.

21233310020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233310020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24057855360).

21233310020 is an abundant number, since it is smaller than the sum of its proper divisors (26882400700).

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

21233310020 is a wasteful number, since it uses less digits than its factorization.

21233310020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162884 (or 162882 counting only the distinct ones).

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

Adding to 21233310020 its reverse (2001333212), we get a palindrome (23234643232).

The spelling of 21233310020 in words is "twenty-one billion, two hundred thirty-three million, three hundred ten thousand, twenty".