20655443253 has 16 divisors (see below), whose sum is σ = 27905024000. Its totient is φ = 13588277040.

The previous prime is 20655443233. The next prime is 20655443287. The reversal of 20655443253 is 35234455602.

It is not a de Polignac number, because 20655443253 - 2⁹ = 20655442741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20655443233) 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, 410148 + ... + 457746.

It is an arithmetic number, because the mean of its divisors is an integer number (1744064000).

Almost surely, 2^20655443253 is an apocalyptic number.

It is an amenable number.

20655443253 is a deficient number, since it is larger than the sum of its proper divisors (7249580747).

20655443253 is a wasteful number, since it uses less digits than its factorization.

20655443253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49512.

The product of its (nonzero) digits is 432000, while the sum is 39.

Adding to 20655443253 its reverse (35234455602), we get a palindrome (55889898855).

The spelling of 20655443253 in words is "twenty billion, six hundred fifty-five million, four hundred forty-three thousand, two hundred fifty-three".