20876887644920 has 16 divisors (see below), whose sum is σ = 46972997201160. Its totient is φ = 8350755057952.

The previous prime is 20876887644917. The next prime is 20876887644937. The reversal of 20876887644920 is 2944678867802.

It is a super-2 number, since 2×20876887644920² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260961095522 + ... + 260961095601.

Almost surely, 2^{20876887644920} is an apocalyptic number.

20876887644920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20876887644920 is an abundant number, since it is smaller than the sum of its proper divisors (26096109556240).

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

20876887644920 is a wasteful number, since it uses less digits than its factorization.

20876887644920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521922191134 (or 521922191130 counting only the distinct ones).

The product of its (nonzero) digits is 520224768, while the sum is 71.

The spelling of 20876887644920 in words is "twenty trillion, eight hundred seventy-six billion, eight hundred eighty-seven million, six hundred forty-four thousand, nine hundred twenty".