19872004 has 12 divisors (see below), whose sum is σ = 34807500. Its totient is φ = 9927008.

The previous prime is 19872001. The next prime is 19872019. The reversal of 19872004 is 40027891.

It can be written as a sum of positive squares in 2 ways, for example, as 17305600 + 2566404 = 4160^2 + 1602^2 .

It is not an unprimeable number, because it can be changed into a prime (19872001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6522 + ... + 9070.

It is an arithmetic number, because the mean of its divisors is an integer number (2900625).

Almost surely, 2^19872004 is an apocalyptic number.

It is an amenable number.

19872004 is a deficient number, since it is larger than the sum of its proper divisors (14935496).

19872004 is a wasteful number, since it uses less digits than its factorization.

19872004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502 (or 4500 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 19872004 is about 4457.8025976932. The cubic root of 19872004 is about 270.8614643022.

Adding to 19872004 its reverse (40027891), we get a palindrome (59899895).

The spelling of 19872004 in words is "nineteen million, eight hundred seventy-two thousand, four".