19671274728 has 48 divisors (see below), whose sum is σ = 60887280480. Its totient is φ = 5620364064.

The previous prime is 19671274703. The next prime is 19671274811. The reversal of 19671274728 is 82747217691.

It is a super-3 number, since 3×19671274728³ (a number of 32 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19514650 + ... + 19515657.

It is an arithmetic number, because the mean of its divisors is an integer number (1268485010).

Almost surely, 2^19671274728 is an apocalyptic number.

19671274728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19671274728 is an abundant number, since it is smaller than the sum of its proper divisors (41216005752).

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

19671274728 is a wasteful number, since it uses less digits than its factorization.

19671274728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39030326 (or 39030319 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The spelling of 19671274728 in words is "nineteen billion, six hundred seventy-one million, two hundred seventy-four thousand, seven hundred twenty-eight".