18628827 has 16 divisors (see below), whose sum is σ = 29621760. Its totient is φ = 10181952.

The previous prime is 18628823. The next prime is 18628853. The reversal of 18628827 is 72882681.

It is not a de Polignac number, because 18628827 - 2² = 18628823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18628823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18802 + ... + 19767.

It is an arithmetic number, because the mean of its divisors is an integer number (1851360).

Almost surely, 2^18628827 is an apocalyptic number.

18628827 is a deficient number, since it is larger than the sum of its proper divisors (10992933).

18628827 is a wasteful number, since it uses less digits than its factorization.

18628827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38602.

The product of its digits is 86016, while the sum is 42.

The square root of 18628827 is about 4316.1124869493. The cubic root of 18628827 is about 265.0911137979.

The spelling of 18628827 in words is "eighteen million, six hundred twenty-eight thousand, eight hundred twenty-seven".