23538834018 has 96 divisors (see below), whose sum is σ = 61224763392. Its totient is φ = 6390252000.

The previous prime is 23538834017. The next prime is 23538834107. The reversal of 23538834018 is 81043883532.

23538834018 is a `hidden beast` number, since 23 + 538 + 83 + 4 + 0 + 18 = 666.

23538834018 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (23538834017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 410703 + ... + 464493.

It is an arithmetic number, because the mean of its divisors is an integer number (637757952).

Almost surely, 2^23538834018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23538834018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30612381696).

23538834018 is an abundant number, since it is smaller than the sum of its proper divisors (37685929374).

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

23538834018 is a wasteful number, since it uses less digits than its factorization.

23538834018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53980 (or 53977 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 23538834018 in words is "twenty-three billion, five hundred thirty-eight million, eight hundred thirty-four thousand, eighteen".