19465868397 has 4 divisors (see below), whose sum is σ = 25954491200. Its totient is φ = 12977245596.

The previous prime is 19465868351. The next prime is 19465868419. The reversal of 19465868397 is 79386856491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19465868397 - 2¹¹ = 19465866349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19465868327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3244311397 + ... + 3244311402.

It is an arithmetic number, because the mean of its divisors is an integer number (6488622800).

Almost surely, 2^19465868397 is an apocalyptic number.

It is an amenable number.

19465868397 is a deficient number, since it is larger than the sum of its proper divisors (6488622803).

19465868397 is an equidigital number, since it uses as much as digits as its factorization.

19465868397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6488622802.

The product of its digits is 78382080, while the sum is 66.

The spelling of 19465868397 in words is "nineteen billion, four hundred sixty-five million, eight hundred sixty-eight thousand, three hundred ninety-seven".