19147574956 has 6 divisors (see below), whose sum is σ = 33508256180. Its totient is φ = 9573787476.

The previous prime is 19147574951. The next prime is 19147574959. The reversal of 19147574956 is 65947574191.

It is a self number, because there is not a number n which added to its sum of digits gives 19147574956.

It is not an unprimeable number, because it can be changed into a prime (19147574951) by changing a digit.

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 as a sum of consecutive naturals, namely, 2393446866 + ... + 2393446873.

Almost surely, 2^19147574956 is an apocalyptic number.

It is an amenable number.

19147574956 is a deficient number, since it is larger than the sum of its proper divisors (14360681224).

19147574956 is a wasteful number, since it uses less digits than its factorization.

19147574956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786893743 (or 4786893741 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 58.

The spelling of 19147574956 in words is "nineteen billion, one hundred forty-seven million, five hundred seventy-four thousand, nine hundred fifty-six".