18273801 has 48 divisors (see below), whose sum is σ = 31856640. Its totient is φ = 9097920.

The previous prime is 18273797. The next prime is 18273803. The reversal of 18273801 is 10837281.

It is a happy number.

It is not a de Polignac number, because 18273801 - 2² = 18273797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18273803) 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 47 ways as a sum of consecutive naturals, for example, 67296 + ... + 67566.

It is an arithmetic number, because the mean of its divisors is an integer number (663680).

Almost surely, 2^18273801 is an apocalyptic number.

It is an amenable number.

18273801 is a deficient number, since it is larger than the sum of its proper divisors (13582839).

18273801 is a wasteful number, since it uses less digits than its factorization.

18273801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 18273801 is about 4274.7866613435. The cubic root of 18273801 is about 263.3962759687.

The spelling of 18273801 in words is "eighteen million, two hundred seventy-three thousand, eight hundred one".