20009773 has 8 divisors (see below), whose sum is σ = 23006592. Its totient is φ = 17047536.

The previous prime is 20009761. The next prime is 20009813. The reversal of 20009773 is 37790002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20009773 - 2⁵ = 20009741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20009713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7390 + ... + 9727.

It is an arithmetic number, because the mean of its divisors is an integer number (2875824).

Almost surely, 2^20009773 is an apocalyptic number.

It is an amenable number.

20009773 is a deficient number, since it is larger than the sum of its proper divisors (2996819).

20009773 is a wasteful number, since it uses less digits than its factorization.

20009773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17291.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 20009773 is about 4473.2284761680. The cubic root of 20009773 is about 271.4859677988.

Adding to 20009773 its reverse (37790002), we get a palindrome (57799775).

The spelling of 20009773 in words is "twenty million, nine thousand, seven hundred seventy-three".