18806807 has 4 divisors (see below), whose sum is σ = 18830376. Its totient is φ = 18783240.

The previous prime is 18806797. The next prime is 18806813. The reversal of 18806807 is 70860881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18806807 - 2¹⁰ = 18805783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18806897) 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, 10544 + ... + 12197.

It is an arithmetic number, because the mean of its divisors is an integer number (4707594).

Almost surely, 2^18806807 is an apocalyptic number.

18806807 is a deficient number, since it is larger than the sum of its proper divisors (23569).

18806807 is an equidigital number, since it uses as much as digits as its factorization.

18806807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23568.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 18806807 is about 4336.6815654369. The cubic root of 18806807 is about 265.9326671114.

The spelling of 18806807 in words is "eighteen million, eight hundred six thousand, eight hundred seven".