33423421 has 4 divisors (see below), whose sum is σ = 33437152. Its totient is φ = 33409692.

The previous prime is 33423409. The next prime is 33423431. The reversal of 33423421 is 12432433.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12432433 = 13 ⋅956341.

It is a cyclic number.

It is not a de Polignac number, because 33423421 - 2⁷ = 33423293 is a prime.

It is a super-2 number, since 2×33423421² = 2234250142686482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33423392 and 33423401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33423431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2121 + ... + 8446.

It is an arithmetic number, because the mean of its divisors is an integer number (8359288).

Almost surely, 2^33423421 is an apocalyptic number.

It is an amenable number.

33423421 is a deficient number, since it is larger than the sum of its proper divisors (13731).

33423421 is a wasteful number, since it uses less digits than its factorization.

33423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13730.

The product of its digits is 1728, while the sum is 22.

The square root of 33423421 is about 5781.2992484389. The cubic root of 33423421 is about 322.1194630226.

Adding to 33423421 its reverse (12432433), we get a palindrome (45855854).

The spelling of 33423421 in words is "thirty-three million, four hundred twenty-three thousand, four hundred twenty-one".