18982291878 has 24 divisors (see below), whose sum is σ = 44867235816. Its totient is φ = 5752209600.

The previous prime is 18982291859. The next prime is 18982291883. The reversal of 18982291878 is 87819228981.

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 in 11 ways as a sum of consecutive naturals, for example, 47934883 + ... + 47935278.

It is an arithmetic number, because the mean of its divisors is an integer number (1869468159).

Almost surely, 2^18982291878 is an apocalyptic number.

18982291878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18982291878 is an abundant number, since it is smaller than the sum of its proper divisors (25884943938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18982291878 is a wasteful number, since it uses less digits than its factorization.

18982291878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95870180 (or 95870177 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 63.

The spelling of 18982291878 in words is "eighteen billion, nine hundred eighty-two million, two hundred ninety-one thousand, eight hundred seventy-eight".