18411407 has 6 divisors (see below), whose sum is σ = 21417408. Its totient is φ = 15781164.

The previous prime is 18411397. The next prime is 18411409. The reversal of 18411407 is 70411481.

It is not a de Polignac number, because 18411407 - 2⁶ = 18411343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18411409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 187823 + ... + 187920.

It is an arithmetic number, because the mean of its divisors is an integer number (3569568).

Almost surely, 2^18411407 is an apocalyptic number.

18411407 is a deficient number, since it is larger than the sum of its proper divisors (3006001).

18411407 is an equidigital number, since it uses as much as digits as its factorization.

18411407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375757 (or 375750 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 18411407 is about 4290.8515471873. The cubic root of 18411407 is about 264.0557685597.

Adding to 18411407 its reverse (70411481), we get a palindrome (88822888).

The spelling of 18411407 in words is "eighteen million, four hundred eleven thousand, four hundred seven".