18530129 has 4 divisors (see below), whose sum is σ = 18549300. Its totient is φ = 18510960.

The previous prime is 18530107. The next prime is 18530131. The reversal of 18530129 is 92103581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7980625 + 10549504 = 2825^2 + 3248^2 .

It is a cyclic number.

It is not a de Polignac number, because 18530129 - 2¹² = 18526033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18535129) 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, 8054 + ... + 10095.

It is an arithmetic number, because the mean of its divisors is an integer number (4637325).

Almost surely, 2^18530129 is an apocalyptic number.

It is an amenable number.

18530129 is a deficient number, since it is larger than the sum of its proper divisors (19171).

18530129 is a wasteful number, since it uses less digits than its factorization.

18530129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19170.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 18530129 is about 4304.6636337814. The cubic root of 18530129 is about 264.6221219150.

The spelling of 18530129 in words is "eighteen million, five hundred thirty thousand, one hundred twenty-nine".