20640050753 has 16 divisors (see below), whose sum is σ = 24981611520. Its totient is φ = 16669697616.

The previous prime is 20640050741. The next prime is 20640050789. The reversal of 20640050753 is 35705004602.

It is a cyclic number.

It is not a de Polignac number, because 20640050753 - 2⁴ = 20640050737 is a prime.

It is a super-3 number, since 3×20640050753³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20640050713) 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, 945923 + ... + 967496.

It is an arithmetic number, because the mean of its divisors is an integer number (1561350720).

Almost surely, 2^20640050753 is an apocalyptic number.

20640050753 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20640050753 is a deficient number, since it is larger than the sum of its proper divisors (4341560767).

20640050753 is a wasteful number, since it uses less digits than its factorization.

20640050753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913516.

The product of its (nonzero) digits is 25200, while the sum is 32.

The spelling of 20640050753 in words is "twenty billion, six hundred forty million, fifty thousand, seven hundred fifty-three".