19508428719 has 40 divisors (see below), whose sum is σ = 32748489312. Its totient is φ = 11483208000.

The previous prime is 19508428703. The next prime is 19508428759. The reversal of 19508428719 is 91782480591.

It is a happy number.

19508428719 is a `hidden beast` number, since 1 + 9 + 508 + 42 + 87 + 19 = 666.

It is not a de Polignac number, because 19508428719 - 2⁴ = 19508428703 is a prime.

It is a super-2 number, since 2×19508428719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19508428759) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 378532 + ... + 426969.

Almost surely, 2^19508428719 is an apocalyptic number.

19508428719 is a deficient number, since it is larger than the sum of its proper divisors (13240060593).

19508428719 is a wasteful number, since it uses less digits than its factorization.

19508428719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805549 (or 805540 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 19508428719 in words is "nineteen billion, five hundred eight million, four hundred twenty-eight thousand, seven hundred nineteen".