3300000021 has 28 divisors (see below), whose sum is σ = 5028914860. Its totient is φ = 2163905280.

The previous prime is 3300000001. The next prime is 3300000059. The reversal of 3300000021 is 1200000033.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1767277521 + 1532722500 = 42039^2 + 39150^2 .

It is not a de Polignac number, because 3300000021 - 2⁹ = 3299999509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3299999949 and 3300000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3300000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7365 + ... + 81573.

Almost surely, 2^3300000021 is an apocalyptic number.

It is an amenable number.

3300000021 is a deficient number, since it is larger than the sum of its proper divisors (1728914839).

3300000021 is an frugal number, since it uses more digits than its factorization.

3300000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74288 (or 74273 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 3300000021 is about 57445.6266481618. The cubic root of 3300000021 is about 1488.8055561119.

Adding to 3300000021 its reverse (1200000033), we get a palindrome (4500000054).

The spelling of 3300000021 in words is "three billion, three hundred million, twenty-one", and thus it is an aban number.