19875381 has 8 divisors (see below), whose sum is σ = 27652800. Its totient is φ = 12674112.

The previous prime is 19875379. The next prime is 19875409. The reversal of 19875381 is 18357891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19875381 - 2¹ = 19875379 is a prime.

It is a super-2 number, since 2×19875381² = 790061539790322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19875301) 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 7 ways as a sum of consecutive naturals, for example, 143956 + ... + 144093.

It is an arithmetic number, because the mean of its divisors is an integer number (3456600).

Almost surely, 2^19875381 is an apocalyptic number.

It is an amenable number.

19875381 is a deficient number, since it is larger than the sum of its proper divisors (7777419).

19875381 is a wasteful number, since it uses less digits than its factorization.

19875381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288075.

The product of its digits is 60480, while the sum is 42.

The square root of 19875381 is about 4458.1813556651. The cubic root of 19875381 is about 270.8768066125.

The spelling of 19875381 in words is "nineteen million, eight hundred seventy-five thousand, three hundred eighty-one".