20133021 has 8 divisors (see below), whose sum is σ = 26906400. Its totient is φ = 13390832.

The previous prime is 20132999. The next prime is 20133023. The reversal of 20133021 is 12033102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20133021 - 2⁹ = 20132509 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 20132988 and 20133006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133023) 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 7 ways as a sum of consecutive naturals, for example, 6246 + ... + 8903.

It is an arithmetic number, because the mean of its divisors is an integer number (3363300).

Almost surely, 2^20133021 is an apocalyptic number.

It is an amenable number.

20133021 is a deficient number, since it is larger than the sum of its proper divisors (6773379).

20133021 is a wasteful number, since it uses less digits than its factorization.

20133021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15595.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20133021 is about 4486.9835078814. The cubic root of 20133021 is about 272.0422232967.

Adding to 20133021 its reverse (12033102), we get a palindrome (32166123).

The spelling of 20133021 in words is "twenty million, one hundred thirty-three thousand, twenty-one".