20333012220 has 288 divisors, whose sum is σ = 65383718400. Its totient is φ = 5107415040.

The previous prime is 20333012191. The next prime is 20333012239. The reversal of 20333012220 is 2221033302.

It is a happy number.

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 = 20333012193 and 20333012202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 58260606 + ... + 58260954.

It is an arithmetic number, because the mean of its divisors is an integer number (227026800).

Almost surely, 2^20333012220 is an apocalyptic number.

20333012220 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 20333012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32691859200).

20333012220 is an abundant number, since it is smaller than the sum of its proper divisors (45050706180).

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

20333012220 is a wasteful number, since it uses less digits than its factorization.

20333012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20333012220 its reverse (2221033302), we get a palindrome (22554045522).

The spelling of 20333012220 in words is "twenty billion, three hundred thirty-three million, twelve thousand, two hundred twenty".