18211048 has 16 divisors (see below), whose sum is σ = 34271460. Its totient is φ = 9072000.

The previous prime is 18211033. The next prime is 18211049. The reversal of 18211048 is 84011281.

It can be written as a sum of positive squares in 2 ways, for example, as 14455204 + 3755844 = 3802^2 + 1938^2 .

It is not an unprimeable number, because it can be changed into a prime (18211049) 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, 1803 + ... + 6298.

Almost surely, 2^18211048 is an apocalyptic number.

It is an amenable number.

18211048 is a deficient number, since it is larger than the sum of its proper divisors (16060412).

18211048 is a wasteful number, since it uses less digits than its factorization.

18211048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8388 (or 8384 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 18211048 is about 4267.4404506683. The cubic root of 18211048 is about 263.0944255581.

The spelling of 18211048 in words is "eighteen million, two hundred eleven thousand, forty-eight".