19995127 has 2 divisors, whose sum is σ = 19995128. Its totient is φ = 19995126.

The previous prime is 19995113. The next prime is 19995139. The reversal of 19995127 is 72159991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19995127 - 2²³ = 11606519 is a prime.

It is a super-2 number, since 2×19995127² = 799610207492258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19995427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9997563 + 9997564.

It is an arithmetic number, because the mean of its divisors is an integer number (9997564).

Almost surely, 2^19995127 is an apocalyptic number.

19995127 is a deficient number, since it is larger than the sum of its proper divisors (1).

19995127 is an equidigital number, since it uses as much as digits as its factorization.

19995127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51030, while the sum is 43.

The square root of 19995127 is about 4471.5911038466. The cubic root of 19995127 is about 271.4197142737.

The spelling of 19995127 in words is "nineteen million, nine hundred ninety-five thousand, one hundred twenty-seven".