18323901 has 12 divisors (see below), whose sum is σ = 27448512. Its totient is φ = 12215772.

The previous prime is 18323867. The next prime is 18323933. The reversal of 18323901 is 10932381.

It is not a de Polignac number, because 18323901 - 2¹⁰ = 18322877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18322901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37461 + ... + 37946.

It is an arithmetic number, because the mean of its divisors is an integer number (2287376).

Almost surely, 2^18323901 is an apocalyptic number.

It is an amenable number.

18323901 is a deficient number, since it is larger than the sum of its proper divisors (9124611).

18323901 is an frugal number, since it uses more digits than its factorization.

18323901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75422 (or 75410 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 18323901 is about 4280.6425919481. The cubic root of 18323901 is about 263.6367680281.

The spelling of 18323901 in words is "eighteen million, three hundred twenty-three thousand, nine hundred one".