19027881256 has 16 divisors (see below), whose sum is σ = 35682805440. Its totient is φ = 9512466480.

The previous prime is 19027881253. The next prime is 19027881263. The reversal of 19027881256 is 65218872091.

It is a happy number.

It is a super-2 number, since 2×19027881256² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19027881253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128416 + ... + 233551.

It is an arithmetic number, because the mean of its divisors is an integer number (2230175340).

Almost surely, 2^19027881256 is an apocalyptic number.

It is an amenable number.

19027881256 is a deficient number, since it is larger than the sum of its proper divisors (16654924184).

19027881256 is a wasteful number, since it uses less digits than its factorization.

19027881256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368544 (or 368540 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 19027881256 in words is "nineteen billion, twenty-seven million, eight hundred eighty-one thousand, two hundred fifty-six".