33420005 has 4 divisors (see below), whose sum is σ = 40104012. Its totient is φ = 26736000.

The previous prime is 33420001. The next prime is 33420017. The reversal of 33420005 is 50002433.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21921124 + 11498881 = 4682^2 + 3391^2 .

It is not a de Polignac number, because 33420005 - 2² = 33420001 is a prime.

It is a super-2 number, since 2×33420005² = 2233793468400050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33420001) 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, 3341996 + ... + 3342005.

It is an arithmetic number, because the mean of its divisors is an integer number (10026003).

Almost surely, 2^33420005 is an apocalyptic number.

It is an amenable number.

33420005 is a deficient number, since it is larger than the sum of its proper divisors (6684007).

33420005 is an equidigital number, since it uses as much as digits as its factorization.

33420005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6684006.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 33420005 is about 5781.0038055687. The cubic root of 33420005 is about 322.1084887064.

Adding to 33420005 its reverse (50002433), we get a palindrome (83422438).

The spelling of 33420005 in words is "thirty-three million, four hundred twenty thousand, five".