18395145 has 24 divisors (see below), whose sum is σ = 32005896. Its totient is φ = 9773568.

The previous prime is 18395137. The next prime is 18395149. The reversal of 18395145 is 54159381.

18395145 is a nontrivial binomial coefficient, being equal to C(6066, 2).

It can be written as a sum of positive squares in 4 ways, for example, as 145161 + 18249984 = 381^2 + 4272^2 .

It is not a de Polignac number, because 18395145 - 2³ = 18395137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18395149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14559 + ... + 15771.

It is an arithmetic number, because the mean of its divisors is an integer number (1333579).

Almost surely, 2^18395145 is an apocalyptic number.

18395145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18395145 is the 6065-th triangular number and also the 3033-rd hexagonal number.

It is an amenable number.

18395145 is a deficient number, since it is larger than the sum of its proper divisors (13610751).

18395145 is a wasteful number, since it uses less digits than its factorization.

18395145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1558 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 18395145 is about 4288.9561667147. The cubic root of 18395145 is about 263.9780026437.

The spelling of 18395145 in words is "eighteen million, three hundred ninety-five thousand, one hundred forty-five".