19816725672 has 96 divisors (see below), whose sum is σ = 55655964000. Its totient is φ = 6362294400.

The previous prime is 19816725653. The next prime is 19816725689. The reversal of 19816725672 is 27652761891.

19816725672 is a `hidden beast` number, since 1 + 9 + 8 + 1 + 6 + 72 + 567 + 2 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 863547 + ... + 886197.

It is an arithmetic number, because the mean of its divisors is an integer number (579749625).

Almost surely, 2^19816725672 is an apocalyptic number.

19816725672 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 19816725672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27827982000).

19816725672 is an abundant number, since it is smaller than the sum of its proper divisors (35839238328).

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

19816725672 is a wasteful number, since it uses less digits than its factorization.

19816725672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23111 (or 23104 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 19816725672 in words is "nineteen billion, eight hundred sixteen million, seven hundred twenty-five thousand, six hundred seventy-two".