18686575050 has 288 divisors, whose sum is σ = 57641310720. Its totient is φ = 3960403200.

The previous prime is 18686574997. The next prime is 18686575091. The reversal of 18686575050 is 5057568681.

It is a junction number, because it is equal to n+sod(n) for n = 18686574984 and 18686575002.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5296387 + ... + 5299913.

It is an arithmetic number, because the mean of its divisors is an integer number (200143440).

Almost surely, 2^18686575050 is an apocalyptic number.

18686575050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18686575050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28820655360).

18686575050 is an abundant number, since it is smaller than the sum of its proper divisors (38954735670).

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

18686575050 is a wasteful number, since it uses less digits than its factorization.

18686575050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598 (or 3580 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 51.

The spelling of 18686575050 in words is "eighteen billion, six hundred eighty-six million, five hundred seventy-five thousand, fifty".