18648842 has 32 divisors (see below), whose sum is σ = 30697920. Its totient is φ = 8467200.

The previous prime is 18648841. The next prime is 18648857. The reversal of 18648842 is 24884681.

It is a self number, because there is not a number n which added to its sum of digits gives 18648842.

It is not an unprimeable number, because it can be changed into a prime (18648841) 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 15 ways as a sum of consecutive naturals, for example, 164978 + ... + 165090.

It is an arithmetic number, because the mean of its divisors is an integer number (959310).

Almost surely, 2^18648842 is an apocalyptic number.

18648842 is a deficient number, since it is larger than the sum of its proper divisors (12049078).

18648842 is a wasteful number, since it uses less digits than its factorization.

18648842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its digits is 98304, while the sum is 41.

The square root of 18648842 is about 4318.4305019301. The cubic root of 18648842 is about 265.1860186744.

The spelling of 18648842 in words is "eighteen million, six hundred forty-eight thousand, eight hundred forty-two".