18304129 has 8 divisors (see below), whose sum is σ = 18643968. Its totient is φ = 17967600.

The previous prime is 18304051. The next prime is 18304147. The reversal of 18304129 is 92140381.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18304129 - 2²¹ = 16206977 is a prime.

It is a super-2 number, since 2×18304129² = 670082276897282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18304097 and 18304106.

It is not an unprimeable number, because it can be changed into a prime (18305129) 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, 12114 + ... + 13540.

It is an arithmetic number, because the mean of its divisors is an integer number (2330496).

Almost surely, 2^18304129 is an apocalyptic number.

It is an amenable number.

18304129 is a deficient number, since it is larger than the sum of its proper divisors (339839).

18304129 is a wasteful number, since it uses less digits than its factorization.

18304129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 18304129 is about 4278.3325022724. The cubic root of 18304129 is about 263.5419100944.

The spelling of 18304129 in words is "eighteen million, three hundred four thousand, one hundred twenty-nine".