19963815145 has 8 divisors (see below), whose sum is σ = 24293995200. Its totient is φ = 15746107440.

The previous prime is 19963815107. The next prime is 19963815163. The reversal of 19963815145 is 54151836991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19963815145 - 2⁷ = 19963815017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19963815092 and 19963815101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28117695 + ... + 28118404.

It is an arithmetic number, because the mean of its divisors is an integer number (3036749400).

Almost surely, 2^19963815145 is an apocalyptic number.

It is an amenable number.

19963815145 is a deficient number, since it is larger than the sum of its proper divisors (4330180055).

19963815145 is an equidigital number, since it uses as much as digits as its factorization.

19963815145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56236175.

The product of its digits is 1166400, while the sum is 52.

The spelling of 19963815145 in words is "nineteen billion, nine hundred sixty-three million, eight hundred fifteen thousand, one hundred forty-five".