33421020 has 24 divisors (see below), whose sum is σ = 93579024. Its totient is φ = 8912256.

The previous prime is 33420991. The next prime is 33421067. The reversal of 33421020 is 2012433.

It is a super-2 number, since 2×33421020² = 2233929155680800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278449 + ... + 278568.

It is an arithmetic number, because the mean of its divisors is an integer number (3899126).

Almost surely, 2^33421020 is an apocalyptic number.

33421020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33421020 is an abundant number, since it is smaller than the sum of its proper divisors (60158004).

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

33421020 is a wasteful number, since it uses less digits than its factorization.

33421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557029 (or 557027 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 33421020 is about 5781.0915924244. The cubic root of 33421020 is about 322.1117495956. Note that the first 3 decimals are identical.

Adding to 33421020 its reverse (2012433), we get a palindrome (35433453).

The spelling of 33421020 in words is "thirty-three million, four hundred twenty-one thousand, twenty".