19988127 has 20 divisors (see below), whose sum is σ = 31159920. Its totient is φ = 12744864.

The previous prime is 19988099. The next prime is 19988131. The reversal of 19988127 is 72188991.

It is not a de Polignac number, because 19988127 - 2⁷ = 19987999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19988827) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3502 + ... + 7227.

It is an arithmetic number, because the mean of its divisors is an integer number (1557996).

Almost surely, 2^19988127 is an apocalyptic number.

19988127 is a deficient number, since it is larger than the sum of its proper divisors (11171793).

19988127 is a wasteful number, since it uses less digits than its factorization.

19988127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10764 (or 10755 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 19988127 is about 4470.8083161773. The cubic root of 19988127 is about 271.3880372263.

The spelling of 19988127 in words is "nineteen million, nine hundred eighty-eight thousand, one hundred twenty-seven".