19440099100 has 36 divisors (see below), whose sum is σ = 44019151344. Its totient is φ = 7437950080.

The previous prime is 19440099079. The next prime is 19440099139. The reversal of 19440099100 is 199004491.

It is a self number, because there is not a number n which added to its sum of digits gives 19440099100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4223809 + ... + 4228408.

It is an arithmetic number, because the mean of its divisors is an integer number (1222754204).

Almost surely, 2^19440099100 is an apocalyptic number.

19440099100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19440099100 is an abundant number, since it is smaller than the sum of its proper divisors (24579052244).

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

19440099100 is a wasteful number, since it uses less digits than its factorization.

19440099100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8452254 (or 8452247 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 19440099100 in words is "nineteen billion, four hundred forty million, ninety-nine thousand, one hundred".