21848918 has 16 divisors (see below), whose sum is σ = 40336800. Its totient is φ = 8643456.

The previous prime is 21848909. The next prime is 21848921. The reversal of 21848918 is 81984812.

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 7 ways as a sum of consecutive naturals, for example, 59843 + ... + 60206.

It is an arithmetic number, because the mean of its divisors is an integer number (2521050).

Almost surely, 2^21848918 is an apocalyptic number.

21848918 is a deficient number, since it is larger than the sum of its proper divisors (18487882).

21848918 is a wasteful number, since it uses less digits than its factorization.

21848918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120071.

The product of its digits is 36864, while the sum is 41.

The square root of 21848918 is about 4674.2826187555. The cubic root of 21848918 is about 279.5610383812.

The spelling of 21848918 in words is "twenty-one million, eight hundred forty-eight thousand, nine hundred eighteen".