33321020 has 48 divisors (see below), whose sum is σ = 77329728. Its totient is φ = 11996160.

The previous prime is 33321007. The next prime is 33321023. The reversal of 33321020 is 2012333.

It is a super-2 number, since 2×33321020² = 2220580747680800, which contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 33320986 and 33321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33321023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5690 + ... + 9950.

It is an arithmetic number, because the mean of its divisors is an integer number (1611036).

Almost surely, 2^33321020 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 33321020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38664864).

33321020 is an abundant number, since it is smaller than the sum of its proper divisors (44008708).

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

33321020 is a wasteful number, since it uses less digits than its factorization.

33321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310 (or 4308 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 33321020 is about 5772.4362274520. The cubic root of 33321020 is about 321.7901620126.

Adding to 33321020 its reverse (2012333), we get a palindrome (35333353).

The spelling of 33321020 in words is "thirty-three million, three hundred twenty-one thousand, twenty".