20908626803 has 2 divisors, whose sum is σ = 20908626804. Its totient is φ = 20908626802.

The previous prime is 20908626797. The next prime is 20908626821. The reversal of 20908626803 is 30862680902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20908626803 - 2¹⁰ = 20908625779 is a prime.

It is not a weakly prime, because it can be changed into another prime (20908626853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10454313401 + 10454313402.

It is an arithmetic number, because the mean of its divisors is an integer number (10454313402).

Almost surely, 2^20908626803 is an apocalyptic number.

20908626803 is a deficient number, since it is larger than the sum of its proper divisors (1).

20908626803 is an equidigital number, since it uses as much as digits as its factorization.

20908626803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 20908626803 in words is "twenty billion, nine hundred eight million, six hundred twenty-six thousand, eight hundred three".