20877180316680 has 32 divisors (see below), whose sum is σ = 62631540950400. Its totient is φ = 5567248084416.

The previous prime is 20877180316661. The next prime is 20877180316709. The reversal of 20877180316680 is 8661308177802.

It is a self number, because there is not a number n which added to its sum of digits gives 20877180316680.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86988251200 + ... + 86988251439.

It is an arithmetic number, because the mean of its divisors is an integer number (1957235654700).

Almost surely, 2^{20877180316680} is an apocalyptic number.

20877180316680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20877180316680 is an abundant number, since it is smaller than the sum of its proper divisors (41754360633720).

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

20877180316680 is a wasteful number, since it uses less digits than its factorization.

20877180316680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173976502653 (or 173976502649 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 20877180316680 in words is "twenty trillion, eight hundred seventy-seven billion, one hundred eighty million, three hundred sixteen thousand, six hundred eighty".