20996803 has 2 divisors, whose sum is σ = 20996804. Its totient is φ = 20996802.

The previous prime is 20996777. The next prime is 20996849. The reversal of 20996803 is 30869902.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20996803 is a prime.

It is not a weakly prime, because it can be changed into another prime (20996863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10498401 + 10498402.

It is an arithmetic number, because the mean of its divisors is an integer number (10498402).

Almost surely, 2^20996803 is an apocalyptic number.

20996803 is a deficient number, since it is larger than the sum of its proper divisors (1).

20996803 is an equidigital number, since it uses as much as digits as its factorization.

20996803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 20996803 is about 4582.2268603813. The cubic root of 20996803 is about 275.8784164822.

The spelling of 20996803 in words is "twenty million, nine hundred ninety-six thousand, eight hundred three".