19182221945 has 16 divisors (see below), whose sum is σ = 23227985088. Its totient is φ = 15206856000.

The previous prime is 19182221939. The next prime is 19182221957. The reversal of 19182221945 is 54912228191.

It is not a de Polignac number, because 19182221945 - 2¹⁰ = 19182220921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19182221896 and 19182221905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208442 + ... + 286028.

It is an arithmetic number, because the mean of its divisors is an integer number (1451749068).

Almost surely, 2^19182221945 is an apocalyptic number.

It is an amenable number.

19182221945 is a deficient number, since it is larger than the sum of its proper divisors (4045763143).

19182221945 is a wasteful number, since it uses less digits than its factorization.

19182221945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78040.

The product of its digits is 103680, while the sum is 44.

The spelling of 19182221945 in words is "nineteen billion, one hundred eighty-two million, two hundred twenty-one thousand, nine hundred forty-five".