33111132020 has 96 divisors (see below), whose sum is σ = 73255021056. Its totient is φ = 12557376000.

The previous prime is 33111131981. The next prime is 33111132031. The reversal of 33111132020 is 2023111133.

It is a self number, because there is not a number n which added to its sum of digits gives 33111132020.

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, 5919425 + ... + 5925015.

It is an arithmetic number, because the mean of its divisors is an integer number (763073136).

Almost surely, 2^33111132020 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 33111132020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36627510528).

33111132020 is an abundant number, since it is smaller than the sum of its proper divisors (40143889036).

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

33111132020 is a wasteful number, since it uses less digits than its factorization.

33111132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841 (or 5839 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 33111132020 its reverse (2023111133), we get a palindrome (35134243153).

It can be divided in two parts, 3311113 and 2020, that added together give a palindrome (3313133).

The spelling of 33111132020 in words is "thirty-three billion, one hundred eleven million, one hundred thirty-two thousand, twenty".