20877950328840 has 432 divisors, whose sum is σ = 75431264372100. Its totient is φ = 5004369807360.

The previous prime is 20877950328817. The next prime is 20877950328869. The reversal of 20877950328840 is 4882305977802.

20877950328840 is a `hidden beast` number, since 2 + 0 + 8 + 7 + 7 + 9 + 503 + 2 + 88 + 40 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 8373140875044 + 12504809453796 = 2893638^2 + 3536214^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 345008506 + ... + 345069014.

Almost surely, 2^{20877950328840} is an apocalyptic number.

20877950328840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20877950328840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37715632186050).

20877950328840 is an abundant number, since it is smaller than the sum of its proper divisors (54553314043260).

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

20877950328840 is a wasteful number, since it uses less digits than its factorization.

20877950328840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60726 (or 60619 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 20877950328840 in words is "twenty trillion, eight hundred seventy-seven billion, nine hundred fifty million, three hundred twenty-eight thousand, eight hundred forty".