18505829 has 8 divisors (see below), whose sum is σ = 19728000. Its totient is φ = 17308512.

The previous prime is 18505819. The next prime is 18505831. The reversal of 18505829 is 92850581.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18505829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18505792 and 18505801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18505819) 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, 4664 + ... + 7665.

It is an arithmetic number, because the mean of its divisors is an integer number (2466000).

Almost surely, 2^18505829 is an apocalyptic number.

18505829 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18505829 is a deficient number, since it is larger than the sum of its proper divisors (1222171).

18505829 is a wasteful number, since it uses less digits than its factorization.

18505829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12427.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 18505829 is about 4301.8401876406. The cubic root of 18505829 is about 264.5063981214.

The spelling of 18505829 in words is "eighteen million, five hundred five thousand, eight hundred twenty-nine".