19209785950 has 48 divisors (see below), whose sum is σ = 36537661440. Its totient is φ = 7510692320.

The previous prime is 19209785879. The next prime is 19209785981. The reversal of 19209785950 is 5958790291.

It is a junction number, because it is equal to n+sod(n) for n = 19209785891 and 19209785900.

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 23 ways as a sum of consecutive naturals, for example, 1966779 + ... + 1976521.

It is an arithmetic number, because the mean of its divisors is an integer number (761201280).

Almost surely, 2^19209785950 is an apocalyptic number.

19209785950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19209785950 is a deficient number, since it is larger than the sum of its proper divisors (17327875490).

19209785950 is a wasteful number, since it uses less digits than its factorization.

19209785950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10641 (or 10636 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 55.

The spelling of 19209785950 in words is "nineteen billion, two hundred nine million, seven hundred eighty-five thousand, nine hundred fifty".