20627197 has 2 divisors, whose sum is σ = 20627198. Its totient is φ = 20627196.

The previous prime is 20627153. The next prime is 20627209. The reversal of 20627197 is 79172602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20376196 + 251001 = 4514^2 + 501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20627197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20627107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10313598 + 10313599.

It is an arithmetic number, because the mean of its divisors is an integer number (10313599).

Almost surely, 2^20627197 is an apocalyptic number.

It is an amenable number.

20627197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20627197 is an equidigital number, since it uses as much as digits as its factorization.

20627197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 20627197 is about 4541.7174064444. The cubic root of 20627197 is about 274.2500647466.

Adding to 20627197 its reverse (79172602), we get a palindrome (99799799).

The spelling of 20627197 in words is "twenty million, six hundred twenty-seven thousand, one hundred ninety-seven".