33530020 has 12 divisors (see below), whose sum is σ = 70413084. Its totient is φ = 13412000.

The previous prime is 33530009. The next prime is 33530023. The reversal of 33530020 is 2003533.

It can be written as a sum of positive squares in 2 ways, for example, as 3587236 + 29942784 = 1894^2 + 5472^2 .

It is a super-2 number, since 2×33530020² = 2248524482400800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33529976 and 33530003.

It is not an unprimeable number, because it can be changed into a prime (33530023) 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, 838231 + ... + 838270.

It is an arithmetic number, because the mean of its divisors is an integer number (5867757).

Almost surely, 2^33530020 is an apocalyptic number.

It is an amenable number.

33530020 is an abundant number, since it is smaller than the sum of its proper divisors (36883064).

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

33530020 is a wasteful number, since it uses less digits than its factorization.

33530020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676510 (or 1676508 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 16.

The square root of 33530020 is about 5790.5112036849. The cubic root of 33530020 is about 322.4615502104.

Adding to 33530020 its reverse (2003533), we get a palindrome (35533553).

The spelling of 33530020 in words is "thirty-three million, five hundred thirty thousand, twenty".