18401146 has 8 divisors (see below), whose sum is σ = 27846324. Its totient is φ = 9119040.

The previous prime is 18401143. The next prime is 18401189. The reversal of 18401146 is 64110481.

It can be written as a sum of positive squares in 2 ways, for example, as 18395521 + 5625 = 4289^2 + 75^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18401146² = 677204348226632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18401146.

It is not an unprimeable number, because it can be changed into a prime (18401143) 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 3 ways as a sum of consecutive naturals, for example, 40485 + ... + 40936.

Almost surely, 2^18401146 is an apocalyptic number.

18401146 is a deficient number, since it is larger than the sum of its proper divisors (9445178).

18401146 is a wasteful number, since it uses less digits than its factorization.

18401146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81536.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18401146 is about 4289.6556971393. The cubic root of 18401146 is about 264.0067051404.

The spelling of 18401146 in words is "eighteen million, four hundred one thousand, one hundred forty-six".