20857713503 has 16 divisors (see below), whose sum is σ = 22926527232. Its totient is φ = 18817920000.

The previous prime is 20857713493. The next prime is 20857713509. The reversal of 20857713503 is 30531775802.

It is not a de Polignac number, because 20857713503 - 2¹² = 20857709407 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 (20857713509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1909688 + ... + 1920578.

It is an arithmetic number, because the mean of its divisors is an integer number (1432907952).

Almost surely, 2^20857713503 is an apocalyptic number.

20857713503 is a deficient number, since it is larger than the sum of its proper divisors (2068813729).

20857713503 is a wasteful number, since it uses less digits than its factorization.

20857713503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12206.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 20857713503 in words is "twenty billion, eight hundred fifty-seven million, seven hundred thirteen thousand, five hundred three".