20744166 has 8 divisors (see below), whose sum is σ = 41488344. Its totient is φ = 6914720.

The previous prime is 20744111. The next prime is 20744167. The reversal of 20744166 is 66144702.

It is a sphenic number, since it is the product of 3 distinct primes.

20744166 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20744167) 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, 1728675 + ... + 1728686.

It is an arithmetic number, because the mean of its divisors is an integer number (5186043).

Almost surely, 2^20744166 is an apocalyptic number.

20744166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20744166 is a wasteful number, since it uses less digits than its factorization.

20744166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457366.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20744166 is about 4554.5763798623. The cubic root of 20744166 is about 274.7674772780.

Adding to 20744166 its reverse (66144702), we get a palindrome (86888868).

It can be divided in two parts, 20744 and 166, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20744166 in words is "twenty million, seven hundred forty-four thousand, one hundred sixty-six".