20166224 has 20 divisors (see below), whose sum is σ = 42078036. Its totient is φ = 9307392.

The previous prime is 20166217. The next prime is 20166227. The reversal of 20166224 is 42266102.

It can be written as a sum of positive squares in 2 ways, for example, as 10679824 + 9486400 = 3268^2 + 3080^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20166224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20166227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48269 + ... + 48684.

Almost surely, 2^20166224 is an apocalyptic number.

It is an amenable number.

20166224 is an abundant number, since it is smaller than the sum of its proper divisors (21911812).

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

20166224 is a wasteful number, since it uses less digits than its factorization.

20166224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96974 (or 96968 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20166224 is about 4490.6819081293. The cubic root of 20166224 is about 272.1916901355.

The spelling of 20166224 in words is "twenty million, one hundred sixty-six thousand, two hundred twenty-four".