19875427 has 16 divisors (see below), whose sum is σ = 24369408. Its totient is φ = 15950880.

The previous prime is 19875409. The next prime is 19875437. The reversal of 19875427 is 72457891.

It is not a de Polignac number, because 19875427 - 2¹¹ = 19873379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19875437) 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 in 15 ways as a sum of consecutive naturals, for example, 268 + ... + 6310.

It is an arithmetic number, because the mean of its divisors is an integer number (1523088).

Almost surely, 2^19875427 is an apocalyptic number.

19875427 is a deficient number, since it is larger than the sum of its proper divisors (4493981).

19875427 is a wasteful number, since it uses less digits than its factorization.

19875427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090.

The product of its digits is 141120, while the sum is 43.

The square root of 19875427 is about 4458.1865147165. The cubic root of 19875427 is about 270.8770155867.

It can be divided in two parts, 19875 and 427, that added together give a palindrome (20302).

The spelling of 19875427 in words is "nineteen million, eight hundred seventy-five thousand, four hundred twenty-seven".