33212020 has 12 divisors (see below), whose sum is σ = 69745284. Its totient is φ = 13284800.

The previous prime is 33211993. The next prime is 33212029. The reversal of 33212020 is 2021233.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23251684 + 9960336 = 4822^2 + 3156^2 .

It is a super-2 number, since 2×33212020² = 2206076544960800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33212029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830281 + ... + 830320.

It is an arithmetic number, because the mean of its divisors is an integer number (5812107).

Almost surely, 2^33212020 is an apocalyptic number.

It is an amenable number.

33212020 is an abundant number, since it is smaller than the sum of its proper divisors (36533264).

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

33212020 is a wasteful number, since it uses less digits than its factorization.

33212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660610 (or 1660608 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 33212020 is about 5762.9870726907. The cubic root of 33212020 is about 321.4388978223.

Adding to 33212020 its reverse (2021233), we get a palindrome (35233253).

The spelling of 33212020 in words is "thirty-three million, two hundred twelve thousand, twenty".