20889616 has 20 divisors (see below), whose sum is σ = 44153424. Its totient is φ = 9495200.

The previous prime is 20889613. The next prime is 20889643. The reversal of 20889616 is 61698802.

It is not an unprimeable number, because it can be changed into a prime (20889613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59170 + ... + 59521.

Almost surely, 2^20889616 is an apocalyptic number.

It is an amenable number.

20889616 is an abundant number, since it is smaller than the sum of its proper divisors (23263808).

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

20889616 is a wasteful number, since it uses less digits than its factorization.

20889616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118710 (or 118704 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 20889616 is about 4570.5159446172. The cubic root of 20889616 is about 275.4081696308.

The spelling of 20889616 in words is "twenty million, eight hundred eighty-nine thousand, six hundred sixteen".