18322401 has 8 divisors (see below), whose sum is σ = 24481984. Its totient is φ = 12188880.

The previous prime is 18322399. The next prime is 18322411. The reversal of 18322401 is 10422381.

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

It is not a de Polignac number, because 18322401 - 2¹ = 18322399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18322411) 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 7 ways as a sum of consecutive naturals, for example, 4810 + ... + 7731.

It is an arithmetic number, because the mean of its divisors is an integer number (3060248).

Almost surely, 2^18322401 is an apocalyptic number.

It is an amenable number.

18322401 is a deficient number, since it is larger than the sum of its proper divisors (6159583).

18322401 is a wasteful number, since it uses less digits than its factorization.

18322401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 18322401 is about 4280.4673810228. The cubic root of 18322401 is about 263.6295740369.

Adding to 18322401 its reverse (10422381), we get a palindrome (28744782).

The spelling of 18322401 in words is "eighteen million, three hundred twenty-two thousand, four hundred one".