18358195968 has 288 divisors, whose sum is σ = 63223372800. Its totient is φ = 5145513984.

The previous prime is 18358195951. The next prime is 18358195969. The reversal of 18358195968 is 86959185381.

18358195968 is a `hidden beast` number, since 1 + 8 + 35 + 8 + 1 + 9 + 596 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18358195969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2560773 + ... + 2567931.

It is an arithmetic number, because the mean of its divisors is an integer number (219525600).

Almost surely, 2^18358195968 is an apocalyptic number.

18358195968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18358195968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31611686400).

18358195968 is an abundant number, since it is smaller than the sum of its proper divisors (44865176832).

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

18358195968 is an equidigital number, since it uses as much as digits as its factorization.

18358195968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7244 (or 7224 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 63.

The spelling of 18358195968 in words is "eighteen billion, three hundred fifty-eight million, one hundred ninety-five thousand, nine hundred sixty-eight".