17926988494 has 4 divisors (see below), whose sum is σ = 26890482744. Its totient is φ = 8963494246.

The previous prime is 17926988449. The next prime is 17926988557. The reversal of 17926988494 is 49488962971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49488962971 = 7 ⋅7069851853.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4481747122 + ... + 4481747125.

It is an arithmetic number, because the mean of its divisors is an integer number (6722620686).

Almost surely, 2^17926988494 is an apocalyptic number.

17926988494 is a deficient number, since it is larger than the sum of its proper divisors (8963494250).

17926988494 is an equidigital number, since it uses as much as digits as its factorization.

17926988494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8963494249.

The product of its digits is 62705664, while the sum is 67.

The spelling of 17926988494 in words is "seventeen billion, nine hundred twenty-six million, nine hundred eighty-eight thousand, four hundred ninety-four".