20779444 has 24 divisors (see below), whose sum is σ = 41709248. Its totient is φ = 8873280.

The previous prime is 20779441. The next prime is 20779469. The reversal of 20779444 is 44497702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20779441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7579 + ... + 9949.

Almost surely, 2^20779444 is an apocalyptic number.

It is an amenable number.

20779444 is an abundant number, since it is smaller than the sum of its proper divisors (20929804).

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

20779444 is a wasteful number, since it uses less digits than its factorization.

20779444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20779444 is about 4558.4475427496. The cubic root of 20779444 is about 274.9231476706.

The spelling of 20779444 in words is "twenty million, seven hundred seventy-nine thousand, four hundred forty-four".