18783061331776 has 112 divisors (see below), whose sum is σ = 44454401637120. Its totient is φ = 7699014512640.

The previous prime is 18783061331759. The next prime is 18783061331777. The reversal of 18783061331776 is 67713316038781.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18783061331777) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 94914340 + ... + 95112028.

Almost surely, 2^{18783061331776} is an apocalyptic number.

18783061331776 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 18783061331776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22227200818560).

18783061331776 is an abundant number, since it is smaller than the sum of its proper divisors (25671340305344).

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

18783061331776 is a wasteful number, since it uses less digits than its factorization.

18783061331776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206952 (or 206942 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 18783061331776 in words is "eighteen trillion, seven hundred eighty-three billion, sixty-one million, three hundred thirty-one thousand, seven hundred seventy-six".