20670244 has 12 divisors (see below), whose sum is σ = 41340544. Its totient is φ = 8858664.

The previous prime is 20670241. The next prime is 20670259. The reversal of 20670244 is 44207602.

20670244 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20670241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369084 + ... + 369139.

Almost surely, 2^20670244 is an apocalyptic number.

It is an amenable number.

20670244 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.

20670244 is a wasteful number, since it uses less digits than its factorization.

20670244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738234 (or 738232 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20670244 is about 4546.4540028466. The cubic root of 20670244 is about 274.4407101298.

Adding to 20670244 its reverse (44207602), we get a palindrome (64877846).

The spelling of 20670244 in words is "twenty million, six hundred seventy thousand, two hundred forty-four".