19146856985 has 48 divisors (see below), whose sum is σ = 25743505536. Its totient is φ = 13621602816.

The previous prime is 19146856969. The next prime is 19146856987. The reversal of 19146856985 is 58965864191.

It is not a de Polignac number, because 19146856985 - 2⁴ = 19146856969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19146856987) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 18011564 + ... + 18012626.

It is an arithmetic number, because the mean of its divisors is an integer number (536323032).

Almost surely, 2^19146856985 is an apocalyptic number.

It is an amenable number.

19146856985 is a deficient number, since it is larger than the sum of its proper divisors (6596648551).

19146856985 is a wasteful number, since it uses less digits than its factorization.

19146856985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710 (or 1691 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 62.

The spelling of 19146856985 in words is "nineteen billion, one hundred forty-six million, eight hundred fifty-six thousand, nine hundred eighty-five".