20759872 has 56 divisors (see below), whose sum is σ = 47548800. Its totient is φ = 8808960.

The previous prime is 20759867. The next prime is 20759881. The reversal of 20759872 is 27895702.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66597 + ... + 66907.

Almost surely, 2^20759872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20759872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23774400).

20759872 is an abundant number, since it is smaller than the sum of its proper divisors (26788928).

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

20759872 is a wasteful number, since it uses less digits than its factorization.

20759872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 20759872 is about 4556.3002534952. The cubic root of 20759872 is about 274.8368045502.

The spelling of 20759872 in words is "twenty million, seven hundred fifty-nine thousand, eight hundred seventy-two".