33023231220 has 96 divisors (see below), whose sum is σ = 105913479168. Its totient is φ = 7531085952.

The previous prime is 33023231209. The next prime is 33023231287. The reversal of 33023231220 is 2213232033.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97317 + ... + 274803.

It is an arithmetic number, because the mean of its divisors is an integer number (1103265408).

Almost surely, 2^33023231220 is an apocalyptic number.

33023231220 is a gapful number since it is divisible by the number (30) 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 33023231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52956739584).

33023231220 is an abundant number, since it is smaller than the sum of its proper divisors (72890247948).

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

33023231220 is a wasteful number, since it uses less digits than its factorization.

33023231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177949 (or 177947 counting only the distinct ones).

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

Adding to 33023231220 its reverse (2213232033), we get a palindrome (35236463253).

The spelling of 33023231220 in words is "thirty-three billion, twenty-three million, two hundred thirty-one thousand, two hundred twenty".