18716406 has 24 divisors (see below), whose sum is σ = 39511224. Its totient is φ = 5909760.

The previous prime is 18716359. The next prime is 18716407. The reversal of 18716406 is 60461781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18716407) 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, 2155 + ... + 6486.

It is an arithmetic number, because the mean of its divisors is an integer number (1646301).

Almost surely, 2^18716406 is an apocalyptic number.

18716406 is an abundant number, since it is smaller than the sum of its proper divisors (20794818).

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

18716406 is a wasteful number, since it uses less digits than its factorization.

18716406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8684 (or 8665 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18716406 is about 4326.2461788484. The cubic root of 18716406 is about 265.5058854353.

The spelling of 18716406 in words is "eighteen million, seven hundred sixteen thousand, four hundred six".