20907444 has 24 divisors (see below), whose sum is σ = 48934368. Its totient is φ = 6947680.

The previous prime is 20907421. The next prime is 20907449. The reversal of 20907444 is 44470902.

It is a super-2 number, since 2×20907444² = 874242429226272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20907449) 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 7 ways as a sum of consecutive naturals, for example, 1654 + ... + 6674.

It is an arithmetic number, because the mean of its divisors is an integer number (2038932).

Almost surely, 2^20907444 is an apocalyptic number.

It is an amenable number.

20907444 is an abundant number, since it is smaller than the sum of its proper divisors (28026924).

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

20907444 is a wasteful number, since it uses less digits than its factorization.

20907444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5375 (or 5373 counting only the distinct ones).

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

The square root of 20907444 is about 4572.4658555313. The cubic root of 20907444 is about 275.4864953201.

The spelling of 20907444 in words is "twenty million, nine hundred seven thousand, four hundred forty-four".