19497237492913 has 2 divisors, whose sum is σ = 19497237492914. Its totient is φ = 19497237492912.

The previous prime is 19497237492911. The next prime is 19497237492937. The reversal of 19497237492913 is 31929473279491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19470041525169 + 27195967744 = 4412487^2 + 164912^2 .

It is a cyclic number.

It is not a de Polignac number, because 19497237492913 - 2¹ = 19497237492911 is a prime.

Together with 19497237492911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19497237492911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9748618746456 + 9748618746457.

It is an arithmetic number, because the mean of its divisors is an integer number (9748618746457).

Almost surely, 2^{19497237492913} is an apocalyptic number.

It is an amenable number.

19497237492913 is a deficient number, since it is larger than the sum of its proper divisors (1).

19497237492913 is an equidigital number, since it uses as much as digits as its factorization.

19497237492913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185177664, while the sum is 70.

The spelling of 19497237492913 in words is "nineteen trillion, four hundred ninety-seven billion, two hundred thirty-seven million, four hundred ninety-two thousand, nine hundred thirteen".