83421618 has 48 divisors (see below), whose sum is σ = 205511904. Its totient is φ = 22431360.

The previous prime is 83421617. The next prime is 83421631. The reversal of 83421618 is 81612438.

It is not an unprimeable number, because it can be changed into a prime (83421617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3348 + ... + 13343.

It is an arithmetic number, because the mean of its divisors is an integer number (4281498).

Almost surely, 2^83421618 is an apocalyptic number.

83421618 is an abundant number, since it is smaller than the sum of its proper divisors (122090286).

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

83421618 is a wasteful number, since it uses less digits than its factorization.

83421618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16727 (or 16720 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 83421618 is about 9133.5435620574. The cubic root of 83421618 is about 436.9444254497.

The spelling of 83421618 in words is "eighty-three million, four hundred twenty-one thousand, six hundred eighteen".