18130738 has 8 divisors (see below), whose sum is σ = 28795932. Its totient is φ = 8532096.

The previous prime is 18130729. The next prime is 18130757. The reversal of 18130738 is 83703181.

It can be written as a sum of positive squares in 2 ways, for example, as 17164449 + 966289 = 4143^2 + 983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 266595 + ... + 266662.

Almost surely, 2^18130738 is an apocalyptic number.

18130738 is a deficient number, since it is larger than the sum of its proper divisors (10665194).

18130738 is a wasteful number, since it uses less digits than its factorization.

18130738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533276.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18130738 is about 4258.0204320787. The cubic root of 18130738 is about 262.7071103204.

The spelling of 18130738 in words is "eighteen million, one hundred thirty thousand, seven hundred thirty-eight".