20887333 has 2 divisors, whose sum is σ = 20887334. Its totient is φ = 20887332.

The previous prime is 20887313. The next prime is 20887367. The reversal of 20887333 is 33378802.

It is a happy number.

It is an a-pointer prime, because the next prime (20887367) can be obtained adding 20887333 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15350724 + 5536609 = 3918^2 + 2353^2 .

It is a cyclic number.

It is not a de Polignac number, because 20887333 - 2¹⁷ = 20756261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20887313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10443666 + 10443667.

It is an arithmetic number, because the mean of its divisors is an integer number (10443667).

Almost surely, 2^20887333 is an apocalyptic number.

It is an amenable number.

20887333 is a deficient number, since it is larger than the sum of its proper divisors (1).

20887333 is an equidigital number, since it uses as much as digits as its factorization.

20887333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 20887333 is about 4570.2661848081. The cubic root of 20887333 is about 275.3981362605.

The spelling of 20887333 in words is "twenty million, eight hundred eighty-seven thousand, three hundred thirty-three".