20871153203 has 16 divisors (see below), whose sum is σ = 21196800000. Its totient is φ = 20548678752.

The previous prime is 20871153187. The next prime is 20871153209. The reversal of 20871153203 is 30235117802.

It is a cyclic number.

It is not a de Polignac number, because 20871153203 - 2⁴ = 20871153187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20871153203.

It is not an unprimeable number, because it can be changed into a prime (20871153209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10439798 + ... + 10441796.

It is an arithmetic number, because the mean of its divisors is an integer number (1324800000).

Almost surely, 2^20871153203 is an apocalyptic number.

20871153203 is a deficient number, since it is larger than the sum of its proper divisors (325646797).

20871153203 is a wasteful number, since it uses less digits than its factorization.

20871153203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 20871153203 in words is "twenty billion, eight hundred seventy-one million, one hundred fifty-three thousand, two hundred three".