19847371982 has 8 divisors (see below), whose sum is σ = 29898831456. Its totient is φ = 9881094832.

The previous prime is 19847371969. The next prime is 19847372029. The reversal of 19847371982 is 28917374891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21294998 + ... + 21295929.

It is an arithmetic number, because the mean of its divisors is an integer number (3737353932).

Almost surely, 2^19847371982 is an apocalyptic number.

19847371982 is a deficient number, since it is larger than the sum of its proper divisors (10051459474).

19847371982 is a wasteful number, since it uses less digits than its factorization.

19847371982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42591162.

The product of its digits is 6096384, while the sum is 59.

The spelling of 19847371982 in words is "nineteen billion, eight hundred forty-seven million, three hundred seventy-one thousand, nine hundred eighty-two".