18335961 has 24 divisors (see below), whose sum is σ = 30788160. Its totient is φ = 10298016.

The previous prime is 18335959. The next prime is 18335971. The reversal of 18335961 is 16953381.

It is a happy number.

It is not a de Polignac number, because 18335961 - 2¹ = 18335959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18335951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1251 + ... + 6183.

It is an arithmetic number, because the mean of its divisors is an integer number (1282840).

Almost surely, 2^18335961 is an apocalyptic number.

It is an amenable number.

18335961 is a deficient number, since it is larger than the sum of its proper divisors (12452199).

18335961 is a wasteful number, since it uses less digits than its factorization.

18335961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005 (or 5002 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 18335961 is about 4282.0510272532. The cubic root of 18335961 is about 263.6945934542.

The spelling of 18335961 in words is "eighteen million, three hundred thirty-five thousand, nine hundred sixty-one".