18861903296 has 56 divisors (see below), whose sum is σ = 39092245920. Its totient is φ = 9012641792.

The previous prime is 18861903289. The next prime is 18861903331. The reversal of 18861903296 is 69230916881.

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 in 7 ways as a sum of consecutive naturals, for example, 1786160 + ... + 1796688.

It is an arithmetic number, because the mean of its divisors is an integer number (698075820).

Almost surely, 2^18861903296 is an apocalyptic number.

18861903296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18861903296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19546122960).

18861903296 is an abundant number, since it is smaller than the sum of its proper divisors (20230342624).

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

18861903296 is a wasteful number, since it uses less digits than its factorization.

18861903296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11781 (or 11771 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 18861903296 in words is "eighteen billion, eight hundred sixty-one million, nine hundred three thousand, two hundred ninety-six".