19147536090806 has 4 divisors (see below), whose sum is σ = 28721304136212. Its totient is φ = 9573768045402.

The previous prime is 19147536090757. The next prime is 19147536090863. The reversal of 19147536090806 is 60809063574191.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4786884022700 + ... + 4786884022703.

It is an arithmetic number, because the mean of its divisors is an integer number (7180326034053).

Almost surely, 2^{19147536090806} is an apocalyptic number.

19147536090806 is a deficient number, since it is larger than the sum of its proper divisors (9573768045406).

19147536090806 is an equidigital number, since it uses as much as digits as its factorization.

19147536090806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9573768045405.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 19147536090806 in words is "nineteen trillion, one hundred forty-seven billion, five hundred thirty-six million, ninety thousand, eight hundred six".