19138106497 has 8 divisors (see below), whose sum is σ = 20525477760. Its totient is φ = 17788745520.

The previous prime is 19138106483. The next prime is 19138106509. The reversal of 19138106497 is 79460183191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19138106497 - 2¹¹ = 19138104449 is a prime.

It is a super-2 number, since 2×19138106497² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19138106497.

It is not an unprimeable number, because it can be changed into a prime (19138106797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9501529 + ... + 9503542.

It is an arithmetic number, because the mean of its divisors is an integer number (2565684720).

Almost surely, 2^19138106497 is an apocalyptic number.

It is an amenable number.

19138106497 is a deficient number, since it is larger than the sum of its proper divisors (1387371263).

19138106497 is a wasteful number, since it uses less digits than its factorization.

19138106497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19005143.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 19138106497 in words is "nineteen billion, one hundred thirty-eight million, one hundred six thousand, four hundred ninety-seven".