20040433 has 16 divisors (see below), whose sum is σ = 24554880. Its totient is φ = 15964416.

The previous prime is 20040409. The next prime is 20040443. The reversal of 20040433 is 33404002.

It is a cyclic number.

It is not a de Polignac number, because 20040433 - 2¹⁷ = 19909361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20040403) 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 15 ways as a sum of consecutive naturals, for example, 8863 + ... + 10891.

It is an arithmetic number, because the mean of its divisors is an integer number (1534680).

Almost surely, 2^20040433 is an apocalyptic number.

It is an amenable number.

20040433 is a deficient number, since it is larger than the sum of its proper divisors (4514447).

20040433 is a wasteful number, since it uses less digits than its factorization.

20040433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20040433 is about 4476.6542193920. The cubic root of 20040433 is about 271.6245586101.

Adding to 20040433 its reverse (33404002), we get a palindrome (53444435).

The spelling of 20040433 in words is "twenty million, forty thousand, four hundred thirty-three".