20889404 has 12 divisors (see below), whose sum is σ = 36768984. Its totient is φ = 10383984.

The previous prime is 20889397. The next prime is 20889409. The reversal of 20889404 is 40498802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20889409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14402 + ... + 15785.

It is an arithmetic number, because the mean of its divisors is an integer number (3064082).

Almost surely, 2^20889404 is an apocalyptic number.

It is an amenable number.

20889404 is a deficient number, since it is larger than the sum of its proper divisors (15879580).

20889404 is a wasteful number, since it uses less digits than its factorization.

20889404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30364 (or 30362 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 20889404 is about 4570.4927524283. The cubic root of 20889404 is about 275.4072379601.

The spelling of 20889404 in words is "twenty million, eight hundred eighty-nine thousand, four hundred four".