33436421 has 4 divisors (see below), whose sum is σ = 34003200. Its totient is φ = 32869644.

The previous prime is 33436387. The next prime is 33436423. The reversal of 33436421 is 12463433.

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: 12463433 = 97 ⋅128489.

It is a cyclic number.

It is not a de Polignac number, because 33436421 - 2¹⁰ = 33435397 is a prime.

It is a super-2 number, since 2×33436421² = 2235988498578482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33436423) 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, 283301 + ... + 283418.

It is an arithmetic number, because the mean of its divisors is an integer number (8500800).

Almost surely, 2^33436421 is an apocalyptic number.

It is an amenable number.

33436421 is a deficient number, since it is larger than the sum of its proper divisors (566779).

33436421 is an equidigital number, since it uses as much as digits as its factorization.

33436421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566778.

The product of its digits is 5184, while the sum is 26.

The square root of 33436421 is about 5782.4234538816. The cubic root of 33436421 is about 322.1612202704.

Adding to 33436421 its reverse (12463433), we get a palindrome (45899854).

The spelling of 33436421 in words is "thirty-three million, four hundred thirty-six thousand, four hundred twenty-one".