20004533 has 2 divisors, whose sum is σ = 20004534. Its totient is φ = 20004532.

The previous prime is 20004527. The next prime is 20004541. The reversal of 20004533 is 33540002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 485809 = 4418^2 + 697^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004533 - 2²⁰ = 18955957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20004583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002266 + 10002267.

It is an arithmetic number, because the mean of its divisors is an integer number (10002267).

Almost surely, 2^20004533 is an apocalyptic number.

It is an amenable number.

20004533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004533 is an equidigital number, since it uses as much as digits as its factorization.

20004533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20004533 is about 4472.6427310931. The cubic root of 20004533 is about 271.4622675354.

Adding to 20004533 its reverse (33540002), we get a palindrome (53544535).

The spelling of 20004533 in words is "twenty million, four thousand, five hundred thirty-three".