18258434136 has 96 divisors (see below), whose sum is σ = 49836384000. Its totient is φ = 6038753280.

The previous prime is 18258434111. The next prime is 18258434137. The reversal of 18258434136 is 63143485281.

18258434136 is a `hidden beast` number, since 1 + 8 + 2 + 584 + 34 + 1 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18258434091 and 18258434100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18258434137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6173170 + ... + 6176126.

It is an arithmetic number, because the mean of its divisors is an integer number (519129000).

Almost surely, 2^18258434136 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 18258434136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24918192000).

18258434136 is an abundant number, since it is smaller than the sum of its proper divisors (31577949864).

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

18258434136 is a wasteful number, since it uses less digits than its factorization.

18258434136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609 (or 3602 counting only the distinct ones).

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

The spelling of 18258434136 in words is "eighteen billion, two hundred fifty-eight million, four hundred thirty-four thousand, one hundred thirty-six".