20651027 has 2 divisors, whose sum is σ = 20651028. Its totient is φ = 20651026.

The previous prime is 20651021. The next prime is 20651041. The reversal of 20651027 is 72015602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20651027 - 2⁸ = 20650771 is a prime.

It is a Chen prime.

It is equal to p_1309226 and since 20651027 and 1309226 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 20650993 and 20651011.

It is not a weakly prime, because it can be changed into another prime (20651021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325513 + 10325514.

It is an arithmetic number, because the mean of its divisors is an integer number (10325514).

Almost surely, 2^20651027 is an apocalyptic number.

20651027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20651027 is an equidigital number, since it uses as much as digits as its factorization.

20651027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20651027 is about 4544.3401061100. The cubic root of 20651027 is about 274.3556351406.

Adding to 20651027 its reverse (72015602), we get a palindrome (92666629).

The spelling of 20651027 in words is "twenty million, six hundred fifty-one thousand, twenty-seven".