19617872112 has 240 divisors, whose sum is σ = 58610359808. Its totient is φ = 6348948480.

The previous prime is 19617872101. The next prime is 19617872137. The reversal of 19617872112 is 21127871691.

It is a happy number.

19617872112 is a `hidden beast` number, since 1 + 9 + 617 + 8 + 7 + 21 + 1 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45306648 + ... + 45307080.

Almost surely, 2^19617872112 is an apocalyptic number.

19617872112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19617872112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29305179904).

19617872112 is an abundant number, since it is smaller than the sum of its proper divisors (38992487696).

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

19617872112 is a wasteful number, since it uses less digits than its factorization.

19617872112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 752 counting only the distinct ones).

The product of its digits is 84672, while the sum is 45.

The spelling of 19617872112 in words is "nineteen billion, six hundred seventeen million, eight hundred seventy-two thousand, one hundred twelve".