18418413 has 16 divisors (see below), whose sum is σ = 26542656. Its totient is φ = 11293440.

The previous prime is 18418409. The next prime is 18418427. The reversal of 18418413 is 31481481.

It is not a de Polignac number, because 18418413 - 2² = 18418409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18418403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12853 + ... + 14213.

It is an arithmetic number, because the mean of its divisors is an integer number (1658916).

Almost surely, 2^18418413 is an apocalyptic number.

18418413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18418413 is a deficient number, since it is larger than the sum of its proper divisors (8124243).

18418413 is a wasteful number, since it uses less digits than its factorization.

18418413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724.

The product of its digits is 3072, while the sum is 30.

The square root of 18418413 is about 4291.6678576050. The cubic root of 18418413 is about 264.0892575829.

Adding to 18418413 its reverse (31481481), we get a palindrome (49899894).

The spelling of 18418413 in words is "eighteen million, four hundred eighteen thousand, four hundred thirteen".