18003130 has 8 divisors (see below), whose sum is σ = 32405652. Its totient is φ = 7201248.

The previous prime is 18003121. The next prime is 18003131. The reversal of 18003130 is 3130081.

It can be written as a sum of positive squares in 2 ways, for example, as 18003049 + 81 = 4243^2 + 9^2 .

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

It is a super-2 number, since 2×18003130² = 648225379593800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18003131) 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, 900147 + ... + 900166.

Almost surely, 2^18003130 is an apocalyptic number.

18003130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18003130 is a deficient number, since it is larger than the sum of its proper divisors (14402522).

18003130 is a wasteful number, since it uses less digits than its factorization.

18003130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800320.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 18003130 is about 4243.0095451224. The cubic root of 18003130 is about 262.0893291341.

The spelling of 18003130 in words is "eighteen million, three thousand, one hundred thirty".