19212646985 has 64 divisors (see below), whose sum is σ = 28366101504. Its totient is φ = 12192768000.

The previous prime is 19212646967. The next prime is 19212646987. The reversal of 19212646985 is 58964621291.

It is not a de Polignac number, because 19212646985 - 2²⁰ = 19211598409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19212646987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27407135 + ... + 27407835.

It is an arithmetic number, because the mean of its divisors is an integer number (443220336).

Almost surely, 2^19212646985 is an apocalyptic number.

It is an amenable number.

19212646985 is a deficient number, since it is larger than the sum of its proper divisors (9153454519).

19212646985 is a wasteful number, since it uses less digits than its factorization.

19212646985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its digits is 1866240, while the sum is 53.

The spelling of 19212646985 in words is "nineteen billion, two hundred twelve million, six hundred forty-six thousand, nine hundred eighty-five".