18856843960 has 32 divisors (see below), whose sum is σ = 42434121600. Its totient is φ = 7541631360.

The previous prime is 18856843937. The next prime is 18856843961. The reversal of 18856843960 is 6934865881.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18856843895 and 18856843904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18856843961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276025 + ... + 337495.

It is an arithmetic number, because the mean of its divisors is an integer number (1326066300).

Almost surely, 2^18856843960 is an apocalyptic number.

18856843960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18856843960 is an abundant number, since it is smaller than the sum of its proper divisors (23577277640).

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

18856843960 is a wasteful number, since it uses less digits than its factorization.

18856843960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69151 (or 69147 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 18856843960 in words is "eighteen billion, eight hundred fifty-six million, eight hundred forty-three thousand, nine hundred sixty".