19844297012 has 12 divisors (see below), whose sum is σ = 34735575840. Its totient is φ = 9919846776.

The previous prime is 19844297009. The next prime is 19844297021. The reversal of 19844297012 is 21079244891.

It is a super-2 number, since 2×19844297012² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555962 + ... + 590577.

It is an arithmetic number, because the mean of its divisors is an integer number (2894631320).

Almost surely, 2^19844297012 is an apocalyptic number.

It is an amenable number.

19844297012 is a deficient number, since it is larger than the sum of its proper divisors (14891278828).

19844297012 is a wasteful number, since it uses less digits than its factorization.

19844297012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150870 (or 1150868 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 19844297012 in words is "nineteen billion, eight hundred forty-four million, two hundred ninety-seven thousand, twelve".