20889612 has 36 divisors (see below), whose sum is σ = 55102320. Its totient is φ = 6660192.

The previous prime is 20889593. The next prime is 20889613. The reversal of 20889612 is 21698802.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 11787 + ... + 13442.

It is an arithmetic number, because the mean of its divisors is an integer number (1530620).

Almost surely, 2^20889612 is an apocalyptic number.

It is an amenable number.

20889612 is an abundant number, since it is smaller than the sum of its proper divisors (34212708).

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

20889612 is a wasteful number, since it uses less digits than its factorization.

20889612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25262 (or 25257 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 20889612 is about 4570.5155070298. The cubic root of 20889612 is about 275.4081520521.

The spelling of 20889612 in words is "twenty million, eight hundred eighty-nine thousand, six hundred twelve".