20880833 has 2 divisors, whose sum is σ = 20880834. Its totient is φ = 20880832.

The previous prime is 20880809. The next prime is 20880877. The reversal of 20880833 is 33808802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19562929 + 1317904 = 4423^2 + 1148^2 .

It is a cyclic number.

It is not a de Polignac number, because 20880833 - 2¹⁰ = 20879809 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20880833.

It is not a weakly prime, because it can be changed into another prime (20880883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10440416 + 10440417.

It is an arithmetic number, because the mean of its divisors is an integer number (10440417).

Almost surely, 2^20880833 is an apocalyptic number.

It is an amenable number.

20880833 is a deficient number, since it is larger than the sum of its proper divisors (1).

20880833 is an equidigital number, since it uses as much as digits as its factorization.

20880833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 20880833 is about 4569.5550111581. Note that the first 3 decimals coincide. The cubic root of 20880833 is about 275.3695659366.

The spelling of 20880833 in words is "twenty million, eight hundred eighty thousand, eight hundred thirty-three".