19944380158 has 16 divisors (see below), whose sum is σ = 30566226240. Its totient is φ = 9755820576.

The previous prime is 19944380147. The next prime is 19944380167. The reversal of 19944380158 is 85108344991.

It is a congruent number.

It is an unprimeable number.

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, 180160 + ... + 268972.

It is an arithmetic number, because the mean of its divisors is an integer number (1910389140).

Almost surely, 2^19944380158 is an apocalyptic number.

19944380158 is a deficient number, since it is larger than the sum of its proper divisors (10621846082).

19944380158 is a wasteful number, since it uses less digits than its factorization.

19944380158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91251.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 19944380158 in words is "nineteen billion, nine hundred forty-four million, three hundred eighty thousand, one hundred fifty-eight".