19468415617 has 12 divisors (see below), whose sum is σ = 22990507968. Its totient is φ = 16148910600.

The previous prime is 19468415611. The next prime is 19468415621. The reversal of 19468415617 is 71651486491.

It is a happy number.

It is not a de Polignac number, because 19468415617 - 2³ = 19468415609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19468415611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1440309 + ... + 1453762.

It is an arithmetic number, because the mean of its divisors is an integer number (1915875664).

Almost surely, 2^19468415617 is an apocalyptic number.

It is an amenable number.

19468415617 is a deficient number, since it is larger than the sum of its proper divisors (3522092351).

19468415617 is an equidigital number, since it uses as much as digits as its factorization.

19468415617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894140 (or 2894109 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 52.

The spelling of 19468415617 in words is "nineteen billion, four hundred sixty-eight million, four hundred fifteen thousand, six hundred seventeen".