20321433 has 12 divisors (see below), whose sum is σ = 32021808. Its totient is φ = 12315960.

The previous prime is 20321423. The next prime is 20321447. The reversal of 20321433 is 33412302.

It is not a de Polignac number, because 20321433 - 2⁴ = 20321417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102535 + ... + 102732.

It is an arithmetic number, because the mean of its divisors is an integer number (2668484).

Almost surely, 2^20321433 is an apocalyptic number.

It is an amenable number.

20321433 is a deficient number, since it is larger than the sum of its proper divisors (11700375).

20321433 is a wasteful number, since it uses less digits than its factorization.

20321433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205284 (or 205281 counting only the distinct ones).

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

The square root of 20321433 is about 4507.9300127664. The cubic root of 20321433 is about 272.8882124936. Note that the first 3 decimals are identical.

Adding to 20321433 its reverse (33412302), we get a palindrome (53733735).

The spelling of 20321433 in words is "twenty million, three hundred twenty-one thousand, four hundred thirty-three".