18820485494 has 16 divisors (see below), whose sum is σ = 31190984928. Its totient is φ = 8471624832.

The previous prime is 18820485469. The next prime is 18820485499. The reversal of 18820485494 is 49458402881.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18820485499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12032777 + ... + 12034340.

It is an arithmetic number, because the mean of its divisors is an integer number (1949436558).

Almost surely, 2^18820485494 is an apocalyptic number.

18820485494 is a deficient number, since it is larger than the sum of its proper divisors (12370499434).

18820485494 is a wasteful number, since it uses less digits than its factorization.

18820485494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24067159.

The product of its (nonzero) digits is 2949120, while the sum is 53.

The spelling of 18820485494 in words is "eighteen billion, eight hundred twenty million, four hundred eighty-five thousand, four hundred ninety-four".