21332233020 has 96 divisors (see below), whose sum is σ = 68506454016. Its totient is φ = 4858560000.

The previous prime is 21332233009. The next prime is 21332233051. The reversal of 21332233020 is 2033223312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27645 + ... + 208395.

It is an arithmetic number, because the mean of its divisors is an integer number (713608896).

Almost surely, 2^21332233020 is an apocalyptic number.

21332233020 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 21332233020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34253227008).

21332233020 is an abundant number, since it is smaller than the sum of its proper divisors (47174220996).

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

21332233020 is a wasteful number, since it uses less digits than its factorization.

21332233020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181051 (or 181049 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21332233020 its reverse (2033223312), we get a palindrome (23365456332).

The spelling of 21332233020 in words is "twenty-one billion, three hundred thirty-two million, two hundred thirty-three thousand, twenty".