18189652 has 12 divisors (see below), whose sum is σ = 34280596. Its totient is φ = 8395200.

The previous prime is 18189637. The next prime is 18189667. The reversal of 18189652 is 25698181.

It is an interprime number because it is at equal distance from previous prime (18189637) and next prime (18189667).

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 12362256 = 2414^2 + 3516^2 .

It is a super-2 number, since 2×18189652² = 661726879762208, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 174849 + ... + 174952.

Almost surely, 2^18189652 is an apocalyptic number.

It is an amenable number.

18189652 is a deficient number, since it is larger than the sum of its proper divisors (16090944).

18189652 is a wasteful number, since it uses less digits than its factorization.

18189652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349818 (or 349816 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The square root of 18189652 is about 4264.9328247934. The cubic root of 18189652 is about 262.9913494049.

The spelling of 18189652 in words is "eighteen million, one hundred eighty-nine thousand, six hundred fifty-two".