20169620409 has 16 divisors (see below), whose sum is σ = 26949556224. Its totient is φ = 13418077200.

The previous prime is 20169620399. The next prime is 20169620477. The reversal of 20169620409 is 90402696102.

It is not a de Polignac number, because 20169620409 - 2⁷ = 20169620281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20169620209) 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, 5553024 + ... + 5556654.

It is an arithmetic number, because the mean of its divisors is an integer number (1684347264).

Almost surely, 2^20169620409 is an apocalyptic number.

It is an amenable number.

20169620409 is a deficient number, since it is larger than the sum of its proper divisors (6779935815).

20169620409 is a wasteful number, since it uses less digits than its factorization.

20169620409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 20169620409 in words is "twenty billion, one hundred sixty-nine million, six hundred twenty thousand, four hundred nine".