20384009 has 8 divisors (see below), whose sum is σ = 20871552. Its totient is φ = 19902240.

The previous prime is 20383999. The next prime is 20384027. The reversal of 20384009 is 90048302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20384009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20384059) 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, 6164 + ... + 8874.

It is an arithmetic number, because the mean of its divisors is an integer number (2608944).

Almost surely, 2^20384009 is an apocalyptic number.

It is an amenable number.

20384009 is a deficient number, since it is larger than the sum of its proper divisors (487543).

20384009 is a wasteful number, since it uses less digits than its factorization.

20384009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20384009 is about 4514.8653357548. The cubic root of 20384009 is about 273.1680279806.

The spelling of 20384009 in words is "twenty million, three hundred eighty-four thousand, nine".