33421320 has 192 divisors, whose sum is σ = 118609920. Its totient is φ = 8128512.

The previous prime is 33421319. The next prime is 33421327. The reversal of 33421320 is 2312433.

33421320 is a `hidden beast` number, since 3 + 342 + 1 + 320 = 666.

It is a super-2 number, since 2×33421320² = 2233969261084800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 33421293 and 33421302.

It is not an unprimeable number, because it can be changed into a prime (33421327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 263097 + ... + 263223.

It is an arithmetic number, because the mean of its divisors is an integer number (617760).

Almost surely, 2^33421320 is an apocalyptic number.

33421320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33421320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59304960).

33421320 is an abundant number, since it is smaller than the sum of its proper divisors (85188600).

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

33421320 is a wasteful number, since it uses less digits than its factorization.

33421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 33421320 is about 5781.1175390231. The cubic root of 33421320 is about 322.1127133926.

Adding to 33421320 its reverse (2312433), we get a palindrome (35733753).

The spelling of 33421320 in words is "thirty-three million, four hundred twenty-one thousand, three hundred twenty".