20499833 has 2 divisors, whose sum is σ = 20499834. Its totient is φ = 20499832.

The previous prime is 20499827. The next prime is 20499847. The reversal of 20499833 is 33899402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12020089 + 8479744 = 3467^2 + 2912^2 .

It is a cyclic number.

It is not a de Polignac number, because 20499833 - 2¹⁸ = 20237689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20499893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10249916 + 10249917.

It is an arithmetic number, because the mean of its divisors is an integer number (10249917).

Almost surely, 2^20499833 is an apocalyptic number.

It is an amenable number.

20499833 is a deficient number, since it is larger than the sum of its proper divisors (1).

20499833 is an equidigital number, since it uses as much as digits as its factorization.

20499833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 20499833 is about 4527.6741269663. The cubic root of 20499833 is about 273.6844405602.

The spelling of 20499833 in words is "twenty million, four hundred ninety-nine thousand, eight hundred thirty-three".