17926481990 has 16 divisors (see below), whose sum is σ = 33018079248. Its totient is φ = 7003834656.

The previous prime is 17926481987. The next prime is 17926481999. The reversal of 17926481990 is 9918462971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17926481999) 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 7 ways as a sum of consecutive naturals, for example, 20844317 + ... + 20845176.

It is an arithmetic number, because the mean of its divisors is an integer number (2063629953).

Almost surely, 2^17926481990 is an apocalyptic number.

17926481990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

17926481990 is a deficient number, since it is larger than the sum of its proper divisors (15091597258).

17926481990 is a wasteful number, since it uses less digits than its factorization.

17926481990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41689543.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 17926481990 in words is "seventeen billion, nine hundred twenty-six million, four hundred eighty-one thousand, nine hundred ninety".