19497245884509 has 16 divisors (see below), whose sum is σ = 26630624462400. Its totient is φ = 12681021325440.

The previous prime is 19497245884507. The next prime is 19497245884531. The reversal of 19497245884509 is 90548854279491.

It is not a de Polignac number, because 19497245884509 - 2¹ = 19497245884507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19497245884507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14272794 + ... + 15579060.

It is an arithmetic number, because the mean of its divisors is an integer number (1664414028900).

Almost surely, 2^{19497245884509} is an apocalyptic number.

It is an amenable number.

19497245884509 is a deficient number, since it is larger than the sum of its proper divisors (7133378577891).

19497245884509 is a wasteful number, since it uses less digits than its factorization.

19497245884509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427660.

The product of its (nonzero) digits is 1045094400, while the sum is 75.

The spelling of 19497245884509 in words is "nineteen trillion, four hundred ninety-seven billion, two hundred forty-five million, eight hundred eighty-four thousand, five hundred nine".