18533688870 has 64 divisors (see below), whose sum is σ = 46135624896. Its totient is φ = 4761100800.

The previous prime is 18533688869. The next prime is 18533688893. The reversal of 18533688870 is 7888633581.

It is a self number, because there is not a number n which added to its sum of digits gives 18533688870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29452 + ... + 194768.

It is an arithmetic number, because the mean of its divisors is an integer number (720869139).

Almost surely, 2^18533688870 is an apocalyptic number.

18533688870 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 18533688870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23067812448).

18533688870 is an abundant number, since it is smaller than the sum of its proper divisors (27601936026).

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

18533688870 is a wasteful number, since it uses less digits than its factorization.

18533688870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165465.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 18533688870 in words is "eighteen billion, five hundred thirty-three million, six hundred eighty-eight thousand, eight hundred seventy".