19380391272 has 384 divisors, whose sum is σ = 63725875200. Its totient is φ = 5251737600.

The previous prime is 19380391211. The next prime is 19380391273. The reversal of 19380391272 is 27219308391.

19380391272 is a `hidden beast` number, since 193 + 8 + 0 + 391 + 2 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (19380391273) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24625263 + ... + 24626049.

It is an arithmetic number, because the mean of its divisors is an integer number (165952800).

Almost surely, 2^19380391272 is an apocalyptic number.

19380391272 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 19380391272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31862937600).

19380391272 is an abundant number, since it is smaller than the sum of its proper divisors (44345483928).

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

19380391272 is a wasteful number, since it uses less digits than its factorization.

19380391272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 19380391272 in words is "nineteen billion, three hundred eighty million, three hundred ninety-one thousand, two hundred seventy-two".