20333021 has 8 divisors (see below), whose sum is σ = 21448800. Its totient is φ = 19221840.

The previous prime is 20333011. The next prime is 20333039. The reversal of 20333021 is 12033302.

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 20333021 - 2⁶ = 20332957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20332987 and 20333005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20333011) 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, 11750 + ... + 13368.

It is an arithmetic number, because the mean of its divisors is an integer number (2681100).

Almost surely, 2^20333021 is an apocalyptic number.

It is an amenable number.

20333021 is a deficient number, since it is larger than the sum of its proper divisors (1115779).

20333021 is a wasteful number, since it uses less digits than its factorization.

20333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20333021 is about 4509.2151201734. The cubic root of 20333021 is about 272.9400728082.

Adding to 20333021 its reverse (12033302), we get a palindrome (32366323).

The spelling of 20333021 in words is "twenty million, three hundred thirty-three thousand, twenty-one".