20745211 has 2 divisors, whose sum is σ = 20745212. Its totient is φ = 20745210.

The previous prime is 20745209. The next prime is 20745217. The reversal of 20745211 is 11254702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20745211 - 2¹ = 20745209 is a prime.

It is a super-3 number, since 3×20745211³ (a number of 23 digits) contains 333 as substring.

Together with 20745209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20745217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10372605 + 10372606.

It is an arithmetic number, because the mean of its divisors is an integer number (10372606).

Almost surely, 2^20745211 is an apocalyptic number.

20745211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20745211 is an equidigital number, since it uses as much as digits as its factorization.

20745211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 20745211 is about 4554.6910981975. The cubic root of 20745211 is about 274.7720910602.

Adding to 20745211 its reverse (11254702), we get a palindrome (31999913).

The spelling of 20745211 in words is "twenty million, seven hundred forty-five thousand, two hundred eleven".