20321033 has 4 divisors (see below), whose sum is σ = 20624400. Its totient is φ = 20017668.

The previous prime is 20321023. The next prime is 20321039. The reversal of 20321033 is 33012302.

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.

It is a cyclic number.

It is not a de Polignac number, because 20321033 - 2⁶ = 20320969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20320999 and 20321017.

It is not an unprimeable number, because it can be changed into a prime (20321039) 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, 151583 + ... + 151716.

It is an arithmetic number, because the mean of its divisors is an integer number (5156100).

Almost surely, 2^20321033 is an apocalyptic number.

It is an amenable number.

20321033 is a deficient number, since it is larger than the sum of its proper divisors (303367).

20321033 is an equidigital number, since it uses as much as digits as its factorization.

20321033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303366.

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

The square root of 20321033 is about 4507.8856462870. The cubic root of 20321033 is about 272.8864220031.

Adding to 20321033 its reverse (33012302), we get a palindrome (53333335).

The spelling of 20321033 in words is "twenty million, three hundred twenty-one thousand, thirty-three".