18229508 has 24 divisors (see below), whose sum is σ = 36850464. Its totient is φ = 7798400.

The previous prime is 18229507. The next prime is 18229511. The reversal of 18229508 is 80592281.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (18229507) 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, 11438 + ... + 12933.

It is an arithmetic number, because the mean of its divisors is an integer number (1535436).

Almost surely, 2^18229508 is an apocalyptic number.

It is an amenable number.

18229508 is an abundant number, since it is smaller than the sum of its proper divisors (18620956).

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

18229508 is a wasteful number, since it uses less digits than its factorization.

18229508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24403 (or 24401 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18229508 is about 4269.6027918297. The cubic root of 18229508 is about 263.1832925466.

The spelling of 18229508 in words is "eighteen million, two hundred twenty-nine thousand, five hundred eight".