19981875 has 20 divisors (see below), whose sum is σ = 33295592. Its totient is φ = 10656000.

The previous prime is 19981873. The next prime is 19981889. The reversal of 19981875 is 57818991.

It is not a de Polignac number, because 19981875 - 2¹ = 19981873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19981873) 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, 3454 + ... + 7203.

Almost surely, 2^19981875 is an apocalyptic number.

19981875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19981875 is a deficient number, since it is larger than the sum of its proper divisors (13313717).

19981875 is an equidigital number, since it uses as much as digits as its factorization.

19981875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680 (or 10665 counting only the distinct ones).

The product of its digits is 181440, while the sum is 48.

The square root of 19981875 is about 4470.1090590723. The cubic root of 19981875 is about 271.3597388446.

The spelling of 19981875 in words is "nineteen million, nine hundred eighty-one thousand, eight hundred seventy-five".