16818525 has 36 divisors (see below), whose sum is σ = 31903092. Its totient is φ = 8440320.

The previous prime is 16818517. The next prime is 16818533. The reversal of 16818525 is 52581861.

It is an interprime number because it is at equal distance from previous prime (16818517) and next prime (16818533).

It can be written as a sum of positive squares in 6 ways, for example, as 324 + 16818201 = 18^2 + 4101^2 .

It is not a de Polignac number, because 16818525 - 2³ = 16818517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16818525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1627 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (886197).

Almost surely, 2^16818525 is an apocalyptic number.

16818525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16818525 is a deficient number, since it is larger than the sum of its proper divisors (15084567).

16818525 is a wasteful number, since it uses less digits than its factorization.

16818525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430 (or 4422 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 16818525 is about 4101.0395023701. The cubic root of 16818525 is about 256.2099362310.

The spelling of 16818525 in words is "sixteen million, eight hundred eighteen thousand, five hundred twenty-five".