18805955 has 24 divisors (see below), whose sum is σ = 26717040. Its totient is φ = 12667200.

The previous prime is 18805951. The next prime is 18806077. The reversal of 18805955 is 55950881.

It is not a de Polignac number, because 18805955 - 2² = 18805951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18805951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13805 + ... + 15105.

It is an arithmetic number, because the mean of its divisors is an integer number (1113210).

Almost surely, 2^18805955 is an apocalyptic number.

18805955 is a deficient number, since it is larger than the sum of its proper divisors (7911085).

18805955 is a wasteful number, since it uses less digits than its factorization.

18805955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 18805955 is about 4336.5833325327. The cubic root of 18805955 is about 265.9286512240.

The spelling of 18805955 in words is "eighteen million, eight hundred five thousand, nine hundred fifty-five".