20630497211 has 2 divisors, whose sum is σ = 20630497212. Its totient is φ = 20630497210.

The previous prime is 20630497187. The next prime is 20630497213. The reversal of 20630497211 is 11279403602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20630497211 is a prime.

Together with 20630497213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20630497213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315248605 + 10315248606.

It is an arithmetic number, because the mean of its divisors is an integer number (10315248606).

Almost surely, 2^20630497211 is an apocalyptic number.

20630497211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630497211 is an equidigital number, since it uses as much as digits as its factorization.

20630497211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 20630497211 in words is "twenty billion, six hundred thirty million, four hundred ninety-seven thousand, two hundred eleven".