33123303220 has 144 divisors (see below), whose sum is σ = 82355821632. Its totient is φ = 11155415040.

The previous prime is 33123303139. The next prime is 33123303229. The reversal of 33123303220 is 2230332133.

It is a junction number, because it is equal to n+sod(n) for n = 33123303191 and 33123303200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33123303229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42087667 + ... + 42088453.

It is an arithmetic number, because the mean of its divisors is an integer number (571915428).

Almost surely, 2^33123303220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33123303220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41177910816).

33123303220 is an abundant number, since it is smaller than the sum of its proper divisors (49232518412).

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

33123303220 is a wasteful number, since it uses less digits than its factorization.

33123303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1509 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 33123303220 its reverse (2230332133), we get a palindrome (35353635353).

The spelling of 33123303220 in words is "thirty-three billion, one hundred twenty-three million, three hundred three thousand, two hundred twenty".