20089684 has 6 divisors (see below), whose sum is σ = 35156954. Its totient is φ = 10044840.

The previous prime is 20089661. The next prime is 20089687. The reversal of 20089684 is 48698002.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 3459600 = 4078^2 + 1860^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20089687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2511207 + ... + 2511214.

Almost surely, 2^20089684 is an apocalyptic number.

It is an amenable number.

20089684 is a deficient number, since it is larger than the sum of its proper divisors (15067270).

20089684 is a wasteful number, since it uses less digits than its factorization.

20089684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022425 (or 5022423 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20089684 is about 4482.1517154153. The cubic root of 20089684 is about 271.8468897523.

The spelling of 20089684 in words is "twenty million, eighty-nine thousand, six hundred eighty-four".