20989112 has 8 divisors (see below), whose sum is σ = 39354600. Its totient is φ = 10494552.

The previous prime is 20989103. The next prime is 20989147. The reversal of 20989112 is 21198902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1311812 + ... + 1311827.

It is an arithmetic number, because the mean of its divisors is an integer number (4919325).

Almost surely, 2^20989112 is an apocalyptic number.

It is an amenable number.

20989112 is a deficient number, since it is larger than the sum of its proper divisors (18365488).

20989112 is a wasteful number, since it uses less digits than its factorization.

20989112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623645 (or 2623641 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 20989112 is about 4581.3875627369. The cubic root of 20989112 is about 275.8447281787.

The spelling of 20989112 in words is "twenty million, nine hundred eighty-nine thousand, one hundred twelve".