20117527 has 2 divisors, whose sum is σ = 20117528. Its totient is φ = 20117526.

The previous prime is 20117519. The next prime is 20117549. The reversal of 20117527 is 72571102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20117527 - 2³ = 20117519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20117557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058763 + 10058764.

It is an arithmetic number, because the mean of its divisors is an integer number (10058764).

Almost surely, 2^20117527 is an apocalyptic number.

20117527 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117527 is an equidigital number, since it uses as much as digits as its factorization.

20117527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 20117527 is about 4485.2566258800. The cubic root of 20117527 is about 271.9724191685.

Adding to 20117527 its reverse (72571102), we get a palindrome (92688629).

The spelling of 20117527 in words is "twenty million, one hundred seventeen thousand, five hundred twenty-seven".