20503065436 has 12 divisors (see below), whose sum is σ = 41006130928. Its totient is φ = 8787028032.

The previous prime is 20503065419. The next prime is 20503065461. The reversal of 20503065436 is 63456030502.

20503065436 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366126141 + ... + 366126196.

Almost surely, 2^20503065436 is an apocalyptic number.

It is an amenable number.

20503065436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20503065436 is a wasteful number, since it uses less digits than its factorization.

20503065436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732252348 (or 732252346 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

Adding to 20503065436 its reverse (63456030502), we get a palindrome (83959095938).

The spelling of 20503065436 in words is "twenty billion, five hundred three million, sixty-five thousand, four hundred thirty-six".