18313201 has 4 divisors (see below), whose sum is σ = 18447012. Its totient is φ = 18179392.

The previous prime is 18313189. The next prime is 18313223. The reversal of 18313201 is 10231381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6760000 + 11553201 = 2600^2 + 3399^2 .

It is a cyclic number.

It is not a de Polignac number, because 18313201 - 2⁷ = 18313073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18313231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66700 + ... + 66973.

It is an arithmetic number, because the mean of its divisors is an integer number (4611753).

Almost surely, 2^18313201 is an apocalyptic number.

It is an amenable number.

18313201 is a deficient number, since it is larger than the sum of its proper divisors (133811).

18313201 is a wasteful number, since it uses less digits than its factorization.

18313201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133810.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 18313201 is about 4279.3925970866. The cubic root of 18313201 is about 263.5854423001.

Adding to 18313201 its reverse (10231381), we get a palindrome (28544582).

The spelling of 18313201 in words is "eighteen million, three hundred thirteen thousand, two hundred one".