19188391970 has 32 divisors (see below), whose sum is σ = 38241412416. Its totient is φ = 6873451200.

The previous prime is 19188391951. The next prime is 19188391987. The reversal of 19188391970 is 7919388191.

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 15 ways as a sum of consecutive naturals, for example, 1294421 + ... + 1309160.

It is an arithmetic number, because the mean of its divisors is an integer number (1195044138).

Almost surely, 2^19188391970 is an apocalyptic number.

19188391970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19188391970 is a deficient number, since it is larger than the sum of its proper divisors (19053020446).

19188391970 is a wasteful number, since it uses less digits than its factorization.

19188391970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603666.

The product of its (nonzero) digits is 979776, while the sum is 56.

The spelling of 19188391970 in words is "nineteen billion, one hundred eighty-eight million, three hundred ninety-one thousand, nine hundred seventy".