18530425 has 24 divisors (see below), whose sum is σ = 24775200. Its totient is φ = 13697280.

The previous prime is 18530419. The next prime is 18530431. The reversal of 18530425 is 52403581.

18530425 = T₁₃₀ + T₁₃₁ + ... + T₄₈₃.

It is an interprime number because it is at equal distance from previous prime (18530419) and next prime (18530431).

It is not a de Polignac number, because 18530425 - 2³ = 18530417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18530393 and 18530402.

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 23 ways as a sum of consecutive naturals, for example, 24706 + ... + 25444.

It is an arithmetic number, because the mean of its divisors is an integer number (1032300).

Almost surely, 2^18530425 is an apocalyptic number.

It is an amenable number.

18530425 is a deficient number, since it is larger than the sum of its proper divisors (6244775).

18530425 is a wasteful number, since it uses less digits than its factorization.

18530425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 18530425 is about 4304.6980149599. The cubic root of 18530425 is about 264.6235309307.

The spelling of 18530425 in words is "eighteen million, five hundred thirty thousand, four hundred twenty-five".