19027139517 has 60 divisors (see below), whose sum is σ = 30474655860. Its totient is φ = 11827482624.

The previous prime is 19027139503. The next prime is 19027139533. The reversal of 19027139517 is 71593172091.

It is a happy number.

19027139517 is a `hidden beast` number, since 190 + 2 + 71 + 395 + 1 + 7 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1604723481 + 17422416036 = 40059^2 + 131994^2 .

It is not a de Polignac number, because 19027139517 - 2⁴ = 19027139501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19027139557) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2547853 + ... + 2555309.

It is an arithmetic number, because the mean of its divisors is an integer number (507910931).

Almost surely, 2^19027139517 is an apocalyptic number.

19027139517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19027139517 is a deficient number, since it is larger than the sum of its proper divisors (11447516343).

19027139517 is a wasteful number, since it uses less digits than its factorization.

19027139517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7612 (or 7586 counting only the distinct ones).

The product of its (nonzero) digits is 119070, while the sum is 45.

The spelling of 19027139517 in words is "nineteen billion, twenty-seven million, one hundred thirty-nine thousand, five hundred seventeen".