19875099 has 4 divisors (see below), whose sum is σ = 26500136. Its totient is φ = 13250064.

The previous prime is 19875047. The next prime is 19875103. The reversal of 19875099 is 99057891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99057891 = 3 ⋅33019297.

It is not a de Polignac number, because 19875099 - 2⁷ = 19874971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19870099) 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 3 ways as a sum of consecutive naturals, for example, 3312514 + ... + 3312519.

It is an arithmetic number, because the mean of its divisors is an integer number (6625034).

Almost surely, 2^19875099 is an apocalyptic number.

19875099 is a deficient number, since it is larger than the sum of its proper divisors (6625037).

19875099 is an equidigital number, since it uses as much as digits as its factorization.

19875099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6625036.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 19875099 is about 4458.1497283066. The cubic root of 19875099 is about 270.8755255030.

The spelling of 19875099 in words is "nineteen million, eight hundred seventy-five thousand, ninety-nine".