18340406 has 24 divisors (see below), whose sum is σ = 33039936. Its totient is φ = 7605360.

The previous prime is 18340397. The next prime is 18340409. The reversal of 18340406 is 60404381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20 + ... + 6056.

It is an arithmetic number, because the mean of its divisors is an integer number (1376664).

Almost surely, 2^18340406 is an apocalyptic number.

18340406 is a deficient number, since it is larger than the sum of its proper divisors (14699530).

18340406 is a wasteful number, since it uses less digits than its factorization.

18340406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6084 (or 6077 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 18340406 is about 4282.5700227784. The cubic root of 18340406 is about 263.7158999961.

Adding to 18340406 its reverse (60404381), we get a palindrome (78744787).

The spelling of 18340406 in words is "eighteen million, three hundred forty thousand, four hundred six".