19772254209 has 16 divisors (see below), whose sum is σ = 28058415552. Its totient is φ = 12341833728.

The previous prime is 19772254189. The next prime is 19772254211. The reversal of 19772254209 is 90245227791.

It is not a de Polignac number, because 19772254209 - 2⁷ = 19772254081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19772254409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 994539 + ... + 1014224.

It is an arithmetic number, because the mean of its divisors is an integer number (1753650972).

Almost surely, 2^19772254209 is an apocalyptic number.

It is an amenable number.

19772254209 is a deficient number, since it is larger than the sum of its proper divisors (8286161343).

19772254209 is a wasteful number, since it uses less digits than its factorization.

19772254209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008976.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 19772254209 in words is "nineteen billion, seven hundred seventy-two million, two hundred fifty-four thousand, two hundred nine".