18162628121 has 16 divisors (see below), whose sum is σ = 19885964928. Its totient is φ = 16451424000.

The previous prime is 18162628093. The next prime is 18162628151. The reversal of 18162628121 is 12182626181.

It is a de Polignac number, because none of the positive numbers 2^k-18162628121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18162628151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5243036 + ... + 5246498.

It is an arithmetic number, because the mean of its divisors is an integer number (1242872808).

Almost surely, 2^18162628121 is an apocalyptic number.

18162628121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18162628121 is a deficient number, since it is larger than the sum of its proper divisors (1723336807).

18162628121 is a wasteful number, since it uses less digits than its factorization.

18162628121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072.

The product of its digits is 18432, while the sum is 38.

The spelling of 18162628121 in words is "eighteen billion, one hundred sixty-two million, six hundred twenty-eight thousand, one hundred twenty-one".