18129355 has 8 divisors (see below), whose sum is σ = 21852432. Its totient is φ = 14438688.

The previous prime is 18129337. The next prime is 18129409. The reversal of 18129355 is 55392181.

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 18129355 - 2⁵ = 18129323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18129355.

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 7 ways as a sum of consecutive naturals, for example, 6852 + ... + 9121.

It is an arithmetic number, because the mean of its divisors is an integer number (2731554).

Almost surely, 2^18129355 is an apocalyptic number.

18129355 is a deficient number, since it is larger than the sum of its proper divisors (3723077).

18129355 is a wasteful number, since it uses less digits than its factorization.

18129355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16205.

The product of its digits is 10800, while the sum is 34.

The square root of 18129355 is about 4257.8580295731. The cubic root of 18129355 is about 262.7004304458.

The spelling of 18129355 in words is "eighteen million, one hundred twenty-nine thousand, three hundred fifty-five".