18941543016 has 256 divisors, whose sum is σ = 54013132800. Its totient is φ = 5486745600.

The previous prime is 18941543009. The next prime is 18941543041. The reversal of 18941543016 is 61034514981.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 149145945 + ... + 149146071.

It is an arithmetic number, because the mean of its divisors is an integer number (210988800).

Almost surely, 2^18941543016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18941543016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27006566400).

18941543016 is an abundant number, since it is smaller than the sum of its proper divisors (35071589784).

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

18941543016 is a wasteful number, since it uses less digits than its factorization.

18941543016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 18941543016 in words is "eighteen billion, nine hundred forty-one million, five hundred forty-three thousand, sixteen".