20001433 has 4 divisors (see below), whose sum is σ = 21054160. Its totient is φ = 18948708.

The previous prime is 20001389. The next prime is 20001439. The reversal of 20001433 is 33410002.

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 a de Polignac number, because none of the positive numbers 2^k-20001433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001439) 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 3 ways as a sum of consecutive naturals, for example, 526335 + ... + 526372.

It is an arithmetic number, because the mean of its divisors is an integer number (5263540).

Almost surely, 2^20001433 is an apocalyptic number.

It is an amenable number.

20001433 is a deficient number, since it is larger than the sum of its proper divisors (1052727).

20001433 is a wasteful number, since it uses less digits than its factorization.

20001433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052726.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20001433 is about 4472.2961664004. The cubic root of 20001433 is about 271.4482444387.

Adding to 20001433 its reverse (33410002), we get a palindrome (53411435).

The spelling of 20001433 in words is "twenty million, one thousand, four hundred thirty-three".