18905284608 has 240 divisors, whose sum is σ = 60144483840. Its totient is φ = 5164498944.

The previous prime is 18905284597. The next prime is 18905284613. The reversal of 18905284608 is 80648250981.

It is a super-2 number, since 2×18905284608² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7912278 + ... + 7914666.

It is an arithmetic number, because the mean of its divisors is an integer number (250602016).

Almost surely, 2^18905284608 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 18905284608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30072241920).

18905284608 is an abundant number, since it is smaller than the sum of its proper divisors (41239199232).

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

18905284608 is an equidigital number, since it uses as much as digits as its factorization.

18905284608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450 (or 2424 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 18905284608 in words is "eighteen billion, nine hundred five million, two hundred eighty-four thousand, six hundred eight".