19550748672 has 720 divisors, whose sum is σ = 73280643072. Its totient is φ = 4883742720.

The previous prime is 19550748671. The next prime is 19550748683. The reversal of 19550748672 is 27684705591.

19550748672 is a `hidden beast` number, since 1 + 9 + 550 + 7 + 4 + 86 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (19550748671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 415973353 + ... + 415973399.

Almost surely, 2^19550748672 is an apocalyptic number.

19550748672 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 19550748672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36640321536).

19550748672 is an abundant number, since it is smaller than the sum of its proper divisors (53729894400).

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

19550748672 is a wasteful number, since it uses less digits than its factorization.

19550748672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 19550748672 in words is "nineteen billion, five hundred fifty million, seven hundred forty-eight thousand, six hundred seventy-two".