19849255966 has 16 divisors (see below), whose sum is σ = 29829093840. Its totient is φ = 9906240960.

The previous prime is 19849255957. The next prime is 19849255973. The reversal of 19849255966 is 66955294891.

It is a junction number, because it is equal to n+sod(n) for n = 19849255898 and 19849255907.

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, 4293136 + ... + 4297756.

It is an arithmetic number, because the mean of its divisors is an integer number (1864318365).

Almost surely, 2^19849255966 is an apocalyptic number.

19849255966 is a deficient number, since it is larger than the sum of its proper divisors (9979837874).

19849255966 is a wasteful number, since it uses less digits than its factorization.

19849255966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8139.

The product of its digits is 41990400, while the sum is 64.

The spelling of 19849255966 in words is "nineteen billion, eight hundred forty-nine million, two hundred fifty-five thousand, nine hundred sixty-six".