33021340 has 24 divisors (see below), whose sum is σ = 75649392. Its totient is φ = 12007680.

The previous prime is 33021323. The next prime is 33021341. The reversal of 33021340 is 4312033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33021341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74829 + ... + 75268.

It is an arithmetic number, because the mean of its divisors is an integer number (3152058).

Almost surely, 2^33021340 is an apocalyptic number.

It is an amenable number.

33021340 is an abundant number, since it is smaller than the sum of its proper divisors (42628052).

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

33021340 is a wasteful number, since it uses less digits than its factorization.

33021340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150117 (or 150115 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 33021340 is about 5746.4197549431. The cubic root of 33021340 is about 320.8225582858.

Adding to 33021340 its reverse (4312033), we get a palindrome (37333373).

The spelling of 33021340 in words is "thirty-three million, twenty-one thousand, three hundred forty".