18522805 has 16 divisors (see below), whose sum is σ = 25562880. Its totient is φ = 12621312.

The previous prime is 18522787. The next prime is 18522817. The reversal of 18522805 is 50822581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18522805 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4261 + ... + 7429.

It is an arithmetic number, because the mean of its divisors is an integer number (1597680).

Almost surely, 2^18522805 is an apocalyptic number.

It is an amenable number.

18522805 is a deficient number, since it is larger than the sum of its proper divisors (7040075).

18522805 is a wasteful number, since it uses less digits than its factorization.

18522805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 18522805 is about 4303.8128444439. The cubic root of 18522805 is about 264.5872535155.

The spelling of 18522805 in words is "eighteen million, five hundred twenty-two thousand, eight hundred five".