20703211 has 2 divisors, whose sum is σ = 20703212. Its totient is φ = 20703210.

The previous prime is 20703191. The next prime is 20703223. The reversal of 20703211 is 11230702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20703211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20703251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10351605 + 10351606.

It is an arithmetic number, because the mean of its divisors is an integer number (10351606).

Almost surely, 2^20703211 is an apocalyptic number.

20703211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20703211 is an equidigital number, since it uses as much as digits as its factorization.

20703211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20703211 is about 4550.0781311973. The cubic root of 20703211 is about 274.5865345848.

Adding to 20703211 its reverse (11230702), we get a palindrome (31933913).

The spelling of 20703211 in words is "twenty million, seven hundred three thousand, two hundred eleven".