20880189 has 12 divisors (see below), whose sum is σ = 32902272. Its totient is φ = 12654600.

The previous prime is 20880187. The next prime is 20880191. The reversal of 20880189 is 98108802.

It is an interprime number because it is at equal distance from previous prime (20880187) and next prime (20880191).

It is not a de Polignac number, because 20880189 - 2¹ = 20880187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20880187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105357 + ... + 105554.

It is an arithmetic number, because the mean of its divisors is an integer number (2741856).

Almost surely, 2^20880189 is an apocalyptic number.

It is an amenable number.

20880189 is a deficient number, since it is larger than the sum of its proper divisors (12022083).

20880189 is a wasteful number, since it uses less digits than its factorization.

20880189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210928 (or 210925 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 20880189 is about 4569.4845442347. The cubic root of 20880189 is about 275.3667349540.

The spelling of 20880189 in words is "twenty million, eight hundred eighty thousand, one hundred eighty-nine".