11421618 has 32 divisors (see below), whose sum is σ = 24815616. Its totient is φ = 3483648.

The previous prime is 11421601. The next prime is 11421629. The reversal of 11421618 is 81612411.

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, 9330 + ... + 10482.

It is an arithmetic number, because the mean of its divisors is an integer number (775488).

Almost surely, 2^11421618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11421618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12407808).

11421618 is an abundant number, since it is smaller than the sum of its proper divisors (13393998).

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

11421618 is a wasteful number, since it uses less digits than its factorization.

11421618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298.

The product of its digits is 384, while the sum is 24.

The square root of 11421618 is about 3379.5884364816. The cubic root of 11421618 is about 225.2038843297.

The spelling of 11421618 in words is "eleven million, four hundred twenty-one thousand, six hundred eighteen".