19944243050 has 12 divisors (see below), whose sum is σ = 37096292166. Its totient is φ = 7977697200.

The previous prime is 19944243029. The next prime is 19944243083. The reversal of 19944243050 is 5034244991.

It can be written as a sum of positive squares in 3 ways, for example, as 16907020729 + 3037222321 = 130027^2 + 55111^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19944242989 and 19944243007.

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 5 ways as a sum of consecutive naturals, for example, 199442381 + ... + 199442480.

Almost surely, 2^19944243050 is an apocalyptic number.

19944243050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19944243050 is a deficient number, since it is larger than the sum of its proper divisors (17152049116).

19944243050 is a wasteful number, since it uses less digits than its factorization.

19944243050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398884873 (or 398884868 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 19944243050 in words is "nineteen billion, nine hundred forty-four million, two hundred forty-three thousand, fifty".