18208401 has 8 divisors (see below), whose sum is σ = 24332160. Its totient is φ = 12111792.

The previous prime is 18208391. The next prime is 18208409. The reversal of 18208401 is 10480281.

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

It is not a de Polignac number, because 18208401 - 2¹³ = 18200209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18208409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5166 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (3041520).

Almost surely, 2^18208401 is an apocalyptic number.

It is an amenable number.

18208401 is a deficient number, since it is larger than the sum of its proper divisors (6123759).

18208401 is a wasteful number, since it uses less digits than its factorization.

18208401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13575.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 18208401 is about 4267.1303003307. The cubic root of 18208401 is about 263.0816778991.

Adding to 18208401 its reverse (10480281), we get a palindrome (28688682).

The spelling of 18208401 in words is "eighteen million, two hundred eight thousand, four hundred one".