33221032020 has 144 divisors (see below), whose sum is σ = 112488247872. Its totient is φ = 7866270720.

The previous prime is 33221031997. The next prime is 33221032027. The reversal of 33221032020 is 2023012233.

It is a happy number.

33221032020 is a `hidden beast` number, since 3 + 322 + 1 + 0 + 320 + 20 = 666.

It is a super-2 number, since 2×33221032020² (a number of 22 digits) contains 22 as substring.

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 = 33221031984 and 33221032002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221032027) 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, 109957 + ... + 280236.

It is an arithmetic number, because the mean of its divisors is an integer number (781168388).

Almost surely, 2^33221032020 is an apocalyptic number.

33221032020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33221032020 is an abundant number, since it is smaller than the sum of its proper divisors (79267215852).

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

33221032020 is a wasteful number, since it uses less digits than its factorization.

33221032020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390262 (or 390257 counting only the distinct ones).

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

Adding to 33221032020 its reverse (2023012233), we get a palindrome (35244044253).

The spelling of 33221032020 in words is "thirty-three billion, two hundred twenty-one million, thirty-two thousand, twenty".