18130837 has 4 divisors (see below), whose sum is σ = 18178560. Its totient is φ = 18083116.

The previous prime is 18130817. The next prime is 18130867. The reversal of 18130837 is 73803181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18130837 - 2¹⁹ = 17606549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18130799 and 18130808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18130817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23287 + ... + 24052.

It is an arithmetic number, because the mean of its divisors is an integer number (4544640).

Almost surely, 2^18130837 is an apocalyptic number.

It is an amenable number.

18130837 is a deficient number, since it is larger than the sum of its proper divisors (47723).

18130837 is an equidigital number, since it uses as much as digits as its factorization.

18130837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47722.

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

The square root of 18130837 is about 4258.0320571832. The cubic root of 18130837 is about 262.7075884763.

The spelling of 18130837 in words is "eighteen million, one hundred thirty thousand, eight hundred thirty-seven".