18523130 has 16 divisors (see below), whose sum is σ = 33765120. Its totient is φ = 7315152.

The previous prime is 18523111. The next prime is 18523147. The reversal of 18523130 is 3132581.

It is a junction number, because it is equal to n+sod(n) for n = 18523096 and 18523105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10934 + ... + 12513.

It is an arithmetic number, because the mean of its divisors is an integer number (2110320).

Almost surely, 2^18523130 is an apocalyptic number.

18523130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18523130 is a deficient number, since it is larger than the sum of its proper divisors (15241990).

18523130 is a wasteful number, since it uses less digits than its factorization.

18523130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23533.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 18523130 is about 4303.8506014963. The cubic root of 18523130 is about 264.5888009837.

The spelling of 18523130 in words is "eighteen million, five hundred twenty-three thousand, one hundred thirty".