18206530 has 16 divisors (see below), whose sum is σ = 33234624. Its totient is φ = 7179760.

The previous prime is 18206527. The next prime is 18206533. The reversal of 18206530 is 3560281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18206527) and next prime (18206533).

It is a junction number, because it is equal to n+sod(n) for n = 18206495 and 18206504.

It is not an unprimeable number, because it can be changed into a prime (18206533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12112 + ... + 13531.

It is an arithmetic number, because the mean of its divisors is an integer number (2077164).

Almost surely, 2^18206530 is an apocalyptic number.

18206530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18206530 is a deficient number, since it is larger than the sum of its proper divisors (15028094).

18206530 is a wasteful number, since it uses less digits than its factorization.

18206530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25721.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 18206530 is about 4266.9110607089. The cubic root of 18206530 is about 263.0726666250.

The spelling of 18206530 in words is "eighteen million, two hundred six thousand, five hundred thirty".