19416532806613 has 4 divisors (see below), whose sum is σ = 19890106777548. Its totient is φ = 18942958835680.

The previous prime is 19416532806577. The next prime is 19416532806631. The reversal of 19416532806613 is 31660823561491.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2799675207729 + 16616857598884 = 1673223^2 + 4076378^2 .

It is a cyclic number.

It is not a de Polignac number, because 19416532806613 - 2⁹ = 19416532806101 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 (19416532816613) 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, 236786985406 + ... + 236786985487.

It is an arithmetic number, because the mean of its divisors is an integer number (4972526694387).

Almost surely, 2^{19416532806613} is an apocalyptic number.

It is an amenable number.

19416532806613 is a deficient number, since it is larger than the sum of its proper divisors (473573970935).

19416532806613 is an equidigital number, since it uses as much as digits as its factorization.

19416532806613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473573970934.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 19416532806613 in words is "nineteen trillion, four hundred sixteen billion, five hundred thirty-two million, eight hundred six thousand, six hundred thirteen".