18190452 has 24 divisors (see below), whose sum is σ = 48508096. Its totient is φ = 5197248.

The previous prime is 18190451. The next prime is 18190477. The reversal of 18190452 is 25409181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18190451) 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, 108193 + ... + 108360.

Almost surely, 2^18190452 is an apocalyptic number.

18190452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18190452 is an abundant number, since it is smaller than the sum of its proper divisors (30317644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18190452 is a wasteful number, since it uses less digits than its factorization.

18190452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216567 (or 216565 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18190452 is about 4265.0266118748. The cubic root of 18190452 is about 262.9952048936.

The spelling of 18190452 in words is "eighteen million, one hundred ninety thousand, four hundred fifty-two".