20880672 has 48 divisors (see below), whose sum is σ = 55137600. Its totient is φ = 6918912.

The previous prime is 20880659. The next prime is 20880679. The reversal of 20880672 is 27608802.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (20880679) 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, 18558 + ... + 19650.

It is an arithmetic number, because the mean of its divisors is an integer number (1148700).

Almost surely, 2^20880672 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 20880672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27568800).

20880672 is an abundant number, since it is smaller than the sum of its proper divisors (34256928).

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

20880672 is a wasteful number, since it uses less digits than its factorization.

20880672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20880672 is about 4569.5373945291. The cubic root of 20880672 is about 275.3688581964.

The spelling of 20880672 in words is "twenty million, eight hundred eighty thousand, six hundred seventy-two".