18931048 has 16 divisors (see below), whose sum is σ = 35542980. Its totient is φ = 9452928.

The previous prime is 18931043. The next prime is 18931061. The reversal of 18931048 is 84013981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16793604 + 2137444 = 4098^2 + 1462^2 .

It is not an unprimeable number, because it can be changed into a prime (18931043) 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 3 ways as a sum of consecutive naturals, for example, 8940 + ... + 10852.

Almost surely, 2^18931048 is an apocalyptic number.

It is an amenable number.

18931048 is a deficient number, since it is larger than the sum of its proper divisors (16611932).

18931048 is a wasteful number, since it uses less digits than its factorization.

18931048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3156 (or 3152 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18931048 is about 4350.9824177995. The cubic root of 18931048 is about 266.5169812721.

The spelling of 18931048 in words is "eighteen million, nine hundred thirty-one thousand, forty-eight".