18985829 has 8 divisors (see below), whose sum is σ = 19521600. Its totient is φ = 18453600.

The previous prime is 18985793. The next prime is 18985831. The reversal of 18985829 is 92858981.

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 18985829 - 2⁸ = 18985573 is a prime.

It is a super-3 number, since 3×18985829³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18985849) 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, 12872 + ... + 14270.

It is an arithmetic number, because the mean of its divisors is an integer number (2440200).

Almost surely, 2^18985829 is an apocalyptic number.

It is an amenable number.

18985829 is a deficient number, since it is larger than the sum of its proper divisors (535771).

18985829 is a wasteful number, since it uses less digits than its factorization.

18985829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

The product of its digits is 414720, while the sum is 50.

The square root of 18985829 is about 4357.2731151490. The cubic root of 18985829 is about 266.7738081621.

The spelling of 18985829 in words is "eighteen million, nine hundred eighty-five thousand, eight hundred twenty-nine".