19688427 has 40 divisors (see below), whose sum is σ = 33802560. Its totient is φ = 11294640.

The previous prime is 19688411. The next prime is 19688467. The reversal of 19688427 is 72488691.

It is not a de Polignac number, because 19688427 - 2⁴ = 19688411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19688467) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16348 + ... + 17510.

It is an arithmetic number, because the mean of its divisors is an integer number (845064).

Almost surely, 2^19688427 is an apocalyptic number.

19688427 is a deficient number, since it is larger than the sum of its proper divisors (14114133).

19688427 is a wasteful number, since it uses less digits than its factorization.

19688427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1196 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 19688427 is about 4437.1642971610. The cubic root of 19688427 is about 270.0248125345.

The spelling of 19688427 in words is "nineteen million, six hundred eighty-eight thousand, four hundred twenty-seven".