18683406 has 96 divisors (see below), whose sum is σ = 50561280. Its totient is φ = 5089392.

The previous prime is 18683389. The next prime is 18683411. The reversal of 18683406 is 60438681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60705 + ... + 61011.

It is an arithmetic number, because the mean of its divisors is an integer number (526680).

Almost surely, 2^18683406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18683406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25280640).

18683406 is an abundant number, since it is smaller than the sum of its proper divisors (31877874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18683406 is a wasteful number, since it uses less digits than its factorization.

18683406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 18683406 is about 4322.4305662440. The cubic root of 18683406 is about 265.3497506038.

The spelling of 18683406 in words is "eighteen million, six hundred eighty-three thousand, four hundred six".