20859743885903 has 32 divisors (see below), whose sum is σ = 24020278228800. Its totient is φ = 17976463948800.

The previous prime is 20859743885873. The next prime is 20859743885927. The reversal of 20859743885903 is 30958834795802.

It is not a de Polignac number, because 20859743885903 - 2⁴² = 16461697374799 is a prime.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20859743885933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6330158 + ... + 9043803.

It is an arithmetic number, because the mean of its divisors is an integer number (750633694650).

Almost surely, 2^{20859743885903} is an apocalyptic number.

20859743885903 is a deficient number, since it is larger than the sum of its proper divisors (3160534342897).

20859743885903 is a wasteful number, since it uses less digits than its factorization.

20859743885903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15374123.

The product of its (nonzero) digits is 522547200, while the sum is 71.

The spelling of 20859743885903 in words is "twenty trillion, eight hundred fifty-nine billion, seven hundred forty-three million, eight hundred eighty-five thousand, nine hundred three".