20237009 has 8 divisors (see below), whose sum is σ = 21864192. Its totient is φ = 18619920.

The previous prime is 20237003. The next prime is 20237029. The reversal of 20237009 is 90073202.

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 20237009 - 2⁸ = 20236753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20237003) 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, 1952 + ... + 6654.

It is an arithmetic number, because the mean of its divisors is an integer number (2733024).

Almost surely, 2^20237009 is an apocalyptic number.

It is an amenable number.

20237009 is a deficient number, since it is larger than the sum of its proper divisors (1627183).

20237009 is a wasteful number, since it uses less digits than its factorization.

20237009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20237009 is about 4498.5563239777. The cubic root of 20237009 is about 272.5097895089.

The spelling of 20237009 in words is "twenty million, two hundred thirty-seven thousand, nine".