19478471188 has 12 divisors (see below), whose sum is σ = 37186172352. Its totient is φ = 8853850520.

The previous prime is 19478471099. The next prime is 19478471231. The reversal of 19478471188 is 88117487491.

It is a super-2 number, since 2×19478471188² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 221346220 + ... + 221346307.

It is an arithmetic number, because the mean of its divisors is an integer number (3098847696).

Almost surely, 2^19478471188 is an apocalyptic number.

It is an amenable number.

19478471188 is a deficient number, since it is larger than the sum of its proper divisors (17707701164).

19478471188 is a wasteful number, since it uses less digits than its factorization.

19478471188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442692542 (or 442692540 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 58.

The spelling of 19478471188 in words is "nineteen billion, four hundred seventy-eight million, four hundred seventy-one thousand, one hundred eighty-eight".