20871155033 has 4 divisors (see below), whose sum is σ = 20980428288. Its totient is φ = 20761881780.

The previous prime is 20871155021. The next prime is 20871155047. The reversal of 20871155033 is 33055117802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20871155033 - 2³² = 16576187737 is a prime.

It is a super-2 number, since 2×20871155033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20871154984 and 20871155002.

It is not an unprimeable number, because it can be changed into a prime (20871155003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54636341 + ... + 54636722.

It is an arithmetic number, because the mean of its divisors is an integer number (5245107072).

Almost surely, 2^20871155033 is an apocalyptic number.

It is an amenable number.

20871155033 is a deficient number, since it is larger than the sum of its proper divisors (109273255).

20871155033 is a wasteful number, since it uses less digits than its factorization.

20871155033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109273254.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 20871155033 in words is "twenty billion, eight hundred seventy-one million, one hundred fifty-five thousand, thirty-three".