18813404 has 24 divisors (see below), whose sum is σ = 34220928. Its totient is φ = 9040320.

The previous prime is 18813391. The next prime is 18813419. The reversal of 18813404 is 40431881.

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, 21014 + ... + 21890.

It is an arithmetic number, because the mean of its divisors is an integer number (1425872).

Almost surely, 2^18813404 is an apocalyptic number.

It is an amenable number.

18813404 is a deficient number, since it is larger than the sum of its proper divisors (15407524).

18813404 is a wasteful number, since it uses less digits than its factorization.

18813404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 18813404 is about 4337.4421033600. The cubic root of 18813404 is about 265.9637578527.

The spelling of 18813404 in words is "eighteen million, eight hundred thirteen thousand, four hundred four".