8918421633 has 24 divisors (see below), whose sum is σ = 14078319840. Its totient is φ = 5395469760.

The previous prime is 8918421623. The next prime is 8918421641. The reversal of 8918421633 is 3361248198.

8918421633 is a `hidden beast` number, since 8 + 9 + 1 + 8 + 4 + 2 + 1 + 633 = 666.

8918421633 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8918421633 - 2⁵ = 8918421601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8918421623) 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, 24268 + ... + 135741.

It is an arithmetic number, because the mean of its divisors is an integer number (586596660).

Almost surely, 2^8918421633 is an apocalyptic number.

It is an amenable number.

8918421633 is a deficient number, since it is larger than the sum of its proper divisors (5159898207).

8918421633 is a wasteful number, since it uses less digits than its factorization.

8918421633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160589 (or 160586 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 8918421633 is about 94437.3953103324. The cubic root of 8918421633 is about 2073.7799288485.

The spelling of 8918421633 in words is "eight billion, nine hundred eighteen million, four hundred twenty-one thousand, six hundred thirty-three".