19427871188 has 24 divisors (see below), whose sum is σ = 37208095680. Its totient is φ = 8802630720.

The previous prime is 19427871181. The next prime is 19427871193. The reversal of 19427871188 is 88117872491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19427871181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691568 + ... + 719111.

It is an arithmetic number, because the mean of its divisors is an integer number (1550337320).

Almost surely, 2^19427871188 is an apocalyptic number.

It is an amenable number.

19427871188 is a deficient number, since it is larger than the sum of its proper divisors (17780224492).

19427871188 is a wasteful number, since it uses less digits than its factorization.

19427871188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411007 (or 1411005 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 56.

The spelling of 19427871188 in words is "nineteen billion, four hundred twenty-seven million, eight hundred seventy-one thousand, one hundred eighty-eight".