19440840204 has 36 divisors (see below), whose sum is σ = 51728553240. Its totient is φ = 6139212480.

The previous prime is 19440840203. The next prime is 19440840233. The reversal of 19440840204 is 40204804491.

19440840204 is a `hidden beast` number, since 1 + 9 + 4 + 408 + 40 + 204 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (19440840203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14210457 + ... + 14211824.

Almost surely, 2^19440840204 is an apocalyptic number.

It is an amenable number.

19440840204 is an abundant number, since it is smaller than the sum of its proper divisors (32287713036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19440840204 is a wasteful number, since it uses less digits than its factorization.

19440840204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28422310 (or 28422305 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 19440840204 in words is "nineteen billion, four hundred forty million, eight hundred forty thousand, two hundred four".