20197127 has 2 divisors, whose sum is σ = 20197128. Its totient is φ = 20197126.

The previous prime is 20197123. The next prime is 20197141. The reversal of 20197127 is 72179102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20197127 - 2² = 20197123 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20197127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20197123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098563 + 10098564.

It is an arithmetic number, because the mean of its divisors is an integer number (10098564).

Almost surely, 2^20197127 is an apocalyptic number.

20197127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20197127 is an equidigital number, since it uses as much as digits as its factorization.

20197127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 20197127 is about 4494.1213824284. The cubic root of 20197127 is about 272.3306559429.

The spelling of 20197127 in words is "twenty million, one hundred ninety-seven thousand, one hundred twenty-seven".