19497205884523 has 4 divisors (see below), whose sum is σ = 19497257364880. Its totient is φ = 19497154404168.

The previous prime is 19497205884491. The next prime is 19497205884529. The reversal of 19497205884523 is 32548850279491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19497205884523 - 2⁵ = 19497205884491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19497205884529) 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, 25167840 + ... + 25930957.

It is an arithmetic number, because the mean of its divisors is an integer number (4874314341220).

Almost surely, 2^{19497205884523} is an apocalyptic number.

19497205884523 is a deficient number, since it is larger than the sum of its proper divisors (51480357).

19497205884523 is an equidigital number, since it uses as much as digits as its factorization.

19497205884523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51480356.

The product of its (nonzero) digits is 174182400, while the sum is 67.

The spelling of 19497205884523 in words is "nineteen trillion, four hundred ninety-seven billion, two hundred five million, eight hundred eighty-four thousand, five hundred twenty-three".