20450040009 has 16 divisors (see below), whose sum is σ = 31164067200. Its totient is φ = 11684949120.

The previous prime is 20450039989. The next prime is 20450040011. The reversal of 20450040009 is 90004005402.

It is not a de Polignac number, because 20450040009 - 2¹³ = 20450031817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20450040109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453517 + ... + 496565.

It is an arithmetic number, because the mean of its divisors is an integer number (1947754200).

Almost surely, 2^20450040009 is an apocalyptic number.

It is an amenable number.

20450040009 is a deficient number, since it is larger than the sum of its proper divisors (10714027191).

20450040009 is a wasteful number, since it uses less digits than its factorization.

20450040009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65680.

The product of its (nonzero) digits is 1440, while the sum is 24.

The spelling of 20450040009 in words is "twenty billion, four hundred fifty million, forty thousand, nine".