18018827 has 4 divisors (see below), whose sum is σ = 19078776. Its totient is φ = 16958880.

The previous prime is 18018769. The next prime is 18018839. The reversal of 18018827 is 72881081.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18018827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18018127) 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 3 ways as a sum of consecutive naturals, for example, 529949 + ... + 529982.

It is an arithmetic number, because the mean of its divisors is an integer number (4769694).

Almost surely, 2^18018827 is an apocalyptic number.

18018827 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18018827 is a deficient number, since it is larger than the sum of its proper divisors (1059949).

18018827 is a wasteful number, since it uses less digits than its factorization.

18018827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059948.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 18018827 is about 4244.8588904697. The cubic root of 18018827 is about 262.1654792462.

The spelling of 18018827 in words is "eighteen million, eighteen thousand, eight hundred twenty-seven".