20409860653 has 32 divisors (see below), whose sum is σ = 25597313280. Its totient is φ = 15844308480.

The previous prime is 20409860623. The next prime is 20409860699. The reversal of 20409860653 is 35606890402.

It is not a de Polignac number, because 20409860653 - 2⁵ = 20409860621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20409860623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1051351 + ... + 1070587.

It is an arithmetic number, because the mean of its divisors is an integer number (799916040).

Almost surely, 2^20409860653 is an apocalyptic number.

It is an amenable number.

20409860653 is a deficient number, since it is larger than the sum of its proper divisors (5187452627).

20409860653 is a wasteful number, since it uses less digits than its factorization.

20409860653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19477.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 20409860653 in words is "twenty billion, four hundred nine million, eight hundred sixty thousand, six hundred fifty-three".