20635063253 has 16 divisors (see below), whose sum is σ = 24091789824. Its totient is φ = 17305774080.

The previous prime is 20635063237. The next prime is 20635063261. The reversal of 20635063253 is 35236053602.

It is not a de Polignac number, because 20635063253 - 2⁴ = 20635063237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20635063283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1467251 + ... + 1481247.

It is an arithmetic number, because the mean of its divisors is an integer number (1505736864).

Almost surely, 2^20635063253 is an apocalyptic number.

It is an amenable number.

20635063253 is a deficient number, since it is larger than the sum of its proper divisors (3456726571).

20635063253 is a wasteful number, since it uses less digits than its factorization.

20635063253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18532.

The product of its (nonzero) digits is 97200, while the sum is 35.

The spelling of 20635063253 in words is "twenty billion, six hundred thirty-five million, sixty-three thousand, two hundred fifty-three".