20104089909 has 16 divisors (see below), whose sum is σ = 26930088960. Its totient is φ = 13340461680.

The previous prime is 20104089827. The next prime is 20104089911. The reversal of 20104089909 is 90998040102.

It is not a de Polignac number, because 20104089909 - 2⁷ = 20104089781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104089919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952994 + ... + 1963260.

It is an arithmetic number, because the mean of its divisors is an integer number (1683130560).

Almost surely, 2^20104089909 is an apocalyptic number.

It is an amenable number.

20104089909 is a deficient number, since it is larger than the sum of its proper divisors (6825999051).

20104089909 is a wasteful number, since it uses less digits than its factorization.

20104089909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13240.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 20104089909 in words is "twenty billion, one hundred four million, eighty-nine thousand, nine hundred nine".