18806829 has 4 divisors (see below), whose sum is σ = 25075776. Its totient is φ = 12537884.

The previous prime is 18806813. The next prime is 18806831. The reversal of 18806829 is 92860881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92860881 = 3 ⋅30953627.

It is a cyclic number.

It is not a de Polignac number, because 18806829 - 2⁴ = 18806813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18806869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3134469 + ... + 3134474.

It is an arithmetic number, because the mean of its divisors is an integer number (6268944).

Almost surely, 2^18806829 is an apocalyptic number.

It is an amenable number.

18806829 is a deficient number, since it is larger than the sum of its proper divisors (6268947).

18806829 is an equidigital number, since it uses as much as digits as its factorization.

18806829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6268946.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 18806829 is about 4336.6841019378. The cubic root of 18806829 is about 265.9327708064.

The spelling of 18806829 in words is "eighteen million, eight hundred six thousand, eight hundred twenty-nine".