20650389 has 8 divisors (see below), whose sum is σ = 28731072. Its totient is φ = 13168320.

The previous prime is 20650387. The next prime is 20650423. The reversal of 20650389 is 98305602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20650389 - 2¹ = 20650387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20650381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149572 + ... + 149709.

It is an arithmetic number, because the mean of its divisors is an integer number (3591384).

Almost surely, 2^20650389 is an apocalyptic number.

It is an amenable number.

20650389 is a deficient number, since it is larger than the sum of its proper divisors (8080683).

20650389 is a wasteful number, since it uses less digits than its factorization.

20650389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299307.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20650389 is about 4544.2699083571. The cubic root of 20650389 is about 274.3528097655.

The spelling of 20650389 in words is "twenty million, six hundred fifty thousand, three hundred eighty-nine".