33220013220 has 60 divisors (see below), whose sum is σ = 104212416924. Its totient is φ = 8858669760.

The previous prime is 33220013173. The next prime is 33220013227. The reversal of 33220013220 is 2231002233.

It is a happy number.

33220013220 is a `hidden beast` number, since 332 + 200 + 132 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13930136676 + 19289876544 = 118026^2 + 138888^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×33220013220² (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 = 33220013193 and 33220013202.

It is not an unprimeable number, because it can be changed into a prime (33220013227) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10251471 + ... + 10254710.

Almost surely, 2^33220013220 is an apocalyptic number.

33220013220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33220013220 is an abundant number, since it is smaller than the sum of its proper divisors (70992403704).

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

33220013220 is a wasteful number, since it uses less digits than its factorization.

33220013220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20506202 (or 20506191 counting only the distinct ones).

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

Adding to 33220013220 its reverse (2231002233), we get a palindrome (35451015453).

The spelling of 33220013220 in words is "thirty-three billion, two hundred twenty million, thirteen thousand, two hundred twenty".