20466216 has 64 divisors (see below), whose sum is σ = 58262400. Its totient is φ = 6652800.

The previous prime is 20466179. The next prime is 20466227. The reversal of 20466216 is 61266402.

It is a happy number.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20466216.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7701 + ... + 10011.

It is an arithmetic number, because the mean of its divisors is an integer number (910350).

Almost surely, 2^20466216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20466216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29131200).

20466216 is an abundant number, since it is smaller than the sum of its proper divisors (37796184).

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

20466216 is a wasteful number, since it uses less digits than its factorization.

20466216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367 (or 2357 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20466216 is about 4523.9602120266. The cubic root of 20466216 is about 273.5347566808.

The spelling of 20466216 in words is "twenty million, four hundred sixty-six thousand, two hundred sixteen".