20846466 has 48 divisors (see below), whose sum is σ = 46967544. Its totient is φ = 6676992.

The previous prime is 20846461. The next prime is 20846549. The reversal of 20846466 is 66464802.

It is a happy number.

20846466 is a `hidden beast` number, since 2 + 0 + 8 + 4 + 646 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12809241 + 8037225 = 3579^2 + 2835^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20846466.

It is not an unprimeable number, because it can be changed into a prime (20846461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75120 + ... + 75396.

Almost surely, 2^20846466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20846466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23483772).

20846466 is an abundant number, since it is smaller than the sum of its proper divisors (26121078).

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

20846466 is a wasteful number, since it uses less digits than its factorization.

20846466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 20846466 is about 4565.7930307888. The cubic root of 20846466 is about 275.2184094099.

It can be divided in two parts, 20846 and 466, that added together give a palindrome (21312).

The spelling of 20846466 in words is "twenty million, eight hundred forty-six thousand, four hundred sixty-six".