19622597409 has 10 divisors (see below), whose sum is σ = 29312769090. Its totient is φ = 13081731552.

The previous prime is 19622597387. The next prime is 19622597413. The reversal of 19622597409 is 90479522691.

19622597409 is a `hidden beast` number, since 1 + 9 + 6 + 2 + 2 + 597 + 40 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12071856384 + 7550741025 = 109872^2 + 86895^2 .

It is not a de Polignac number, because 19622597409 - 2¹⁷ = 19622466337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19622597459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 121127064 + ... + 121127225.

It is an arithmetic number, because the mean of its divisors is an integer number (2931276909).

Almost surely, 2^19622597409 is an apocalyptic number.

It is an amenable number.

19622597409 is a deficient number, since it is larger than the sum of its proper divisors (9690171681).

19622597409 is an equidigital number, since it uses as much as digits as its factorization.

19622597409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242254301 (or 242254292 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 19622597409 in words is "nineteen billion, six hundred twenty-two million, five hundred ninety-seven thousand, four hundred nine".