19872285918 has 16 divisors (see below), whose sum is σ = 40590201600. Its totient is φ = 6483157016.

The previous prime is 19872285893. The next prime is 19872285943. The reversal of 19872285918 is 81958227891.

It is an interprime number because it is at equal distance from previous prime (19872285893) and next prime (19872285943).

It is a super-2 number, since 2×19872285918² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35234268 + ... + 35234831.

It is an arithmetic number, because the mean of its divisors is an integer number (2536887600).

Almost surely, 2^19872285918 is an apocalyptic number.

19872285918 is an abundant number, since it is smaller than the sum of its proper divisors (20717915682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19872285918 is a wasteful number, since it uses less digits than its factorization.

19872285918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70469151.

The product of its digits is 5806080, while the sum is 60.

The spelling of 19872285918 in words is "nineteen billion, eight hundred seventy-two million, two hundred eighty-five thousand, nine hundred eighteen".