20828803 has 2 divisors, whose sum is σ = 20828804. Its totient is φ = 20828802.

The previous prime is 20828783. The next prime is 20828827. The reversal of 20828803 is 30882802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20828803 is a prime.

It is not a weakly prime, because it can be changed into another prime (20808803) 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 as a sum of consecutive naturals, namely, 10414401 + 10414402.

It is an arithmetic number, because the mean of its divisors is an integer number (10414402).

Almost surely, 2^20828803 is an apocalyptic number.

20828803 is a deficient number, since it is larger than the sum of its proper divisors (1).

20828803 is an equidigital number, since it uses as much as digits as its factorization.

20828803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 20828803 is about 4563.8583457421. The cubic root of 20828803 is about 275.1406575205.

The spelling of 20828803 in words is "twenty million, eight hundred twenty-eight thousand, eight hundred three".