18340413 has 16 divisors (see below), whose sum is σ = 30097536. Its totient is φ = 9673920.

The previous prime is 18340411. The next prime is 18340423. The reversal of 18340413 is 31404381.

It is not a de Polignac number, because 18340413 - 2¹ = 18340411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340411) 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, 33318 + ... + 33863.

It is an arithmetic number, because the mean of its divisors is an integer number (1881096).

Almost surely, 2^18340413 is an apocalyptic number.

18340413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18340413 is a deficient number, since it is larger than the sum of its proper divisors (11757123).

18340413 is a wasteful number, since it uses less digits than its factorization.

18340413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67204.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 18340413 is about 4282.5708400446. The cubic root of 18340413 is about 263.7159335470.

Adding to 18340413 its reverse (31404381), we get a palindrome (49744794).

The spelling of 18340413 in words is "eighteen million, three hundred forty thousand, four hundred thirteen".