18122877 has 6 divisors (see below), whose sum is σ = 26177502. Its totient is φ = 12081912.

The previous prime is 18122851. The next prime is 18122887. The reversal of 18122877 is 77822181.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15280281 + 2842596 = 3909^2 + 1686^2 .

It is not a de Polignac number, because 18122877 - 2⁶ = 18122813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18122887) 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 5 ways as a sum of consecutive naturals, for example, 1006818 + ... + 1006835.

It is an arithmetic number, because the mean of its divisors is an integer number (4362917).

Almost surely, 2^18122877 is an apocalyptic number.

It is an amenable number.

18122877 is a deficient number, since it is larger than the sum of its proper divisors (8054625).

18122877 is a wasteful number, since it uses less digits than its factorization.

18122877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013659 (or 2013656 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 18122877 is about 4257.0972504748. The cubic root of 18122877 is about 262.6691372545.

The spelling of 18122877 in words is "eighteen million, one hundred twenty-two thousand, eight hundred seventy-seven".