20871845262 has 80 divisors (see below), whose sum is σ = 48227244912. Its totient is φ = 6741792000.

The previous prime is 20871845237. The next prime is 20871845263. The reversal of 20871845262 is 26254817802.

20871845262 is a `hidden beast` number, since 208 + 7 + 184 + 5 + 262 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20871845263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1497558 + ... + 1511430.

Almost surely, 2^20871845262 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20871845262, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24113622456).

20871845262 is an abundant number, since it is smaller than the sum of its proper divisors (27355399650).

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

20871845262 is a wasteful number, since it uses less digits than its factorization.

20871845262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14175 (or 14166 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 20871845262 in words is "twenty billion, eight hundred seventy-one million, eight hundred forty-five thousand, two hundred sixty-two".