19946195361 has 27 divisors (see below), whose sum is σ = 29083609009. Its totient is φ = 13172897832.

The previous prime is 19946195351. The next prime is 19946195363. The reversal of 19946195361 is 16359164991.

It is a happy number.

The square root of 19946195361 is 141231.

It is a perfect power (a square), and thus also a powerful number.

19946195361 is a `hidden beast` number, since 1 + 9 + 94 + 6 + 19 + 536 + 1 = 666.

It is not a de Polignac number, because 19946195361 - 2⁷ = 19946195233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19946195298 and 19946195307.

It is not an unprimeable number, because it can be changed into a prime (19946195363) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 75840916 + ... + 75841178.

Almost surely, 2^19946195361 is an apocalyptic number.

19946195361 is the 141231-st square number.

19946195361 is the 70616-th centered octagonal number.

It is an amenable number.

19946195361 is a deficient number, since it is larger than the sum of its proper divisors (9137413648).

19946195361 is an frugal number, since it uses more digits than its factorization.

19946195361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 445 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The spelling of 19946195361 in words is "nineteen billion, nine hundred forty-six million, one hundred ninety-five thousand, three hundred sixty-one".