20166944 has 24 divisors (see below), whose sum is σ = 45376128. Its totient is φ = 8642880.

The previous prime is 20166931. The next prime is 20166959. The reversal of 20166944 is 44966102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20166944.

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 3 ways as a sum of consecutive naturals, for example, 44792 + ... + 45239.

It is an arithmetic number, because the mean of its divisors is an integer number (1890672).

Almost surely, 2^20166944 is an apocalyptic number.

It is an amenable number.

20166944 is an abundant number, since it is smaller than the sum of its proper divisors (25209184).

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

20166944 is an equidigital number, since it uses as much as digits as its factorization.

20166944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90048 (or 90040 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20166944 is about 4490.7620734125. The cubic root of 20166944 is about 272.1949294741.

The spelling of 20166944 in words is "twenty million, one hundred sixty-six thousand, nine hundred forty-four".