20013171767560 has 128 divisors (see below), whose sum is σ = 45701109792000. Its totient is φ = 7886749409280.

The previous prime is 20013171767557. The next prime is 20013171767647. The reversal of 20013171767560 is 6576717131002.

It is a self number, because there is not a number n which added to its sum of digits gives 20013171767560.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1385083216 + ... + 1385097664.

It is an arithmetic number, because the mean of its divisors is an integer number (357039920250).

Almost surely, 2^{20013171767560} is an apocalyptic number.

20013171767560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013171767560 is an abundant number, since it is smaller than the sum of its proper divisors (25687938024440).

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

20013171767560 is a wasteful number, since it uses less digits than its factorization.

20013171767560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16271 (or 16267 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 46.

Adding to 20013171767560 its reverse (6576717131002), we get a palindrome (26589888898562).

The spelling of 20013171767560 in words is "twenty trillion, thirteen billion, one hundred seventy-one million, seven hundred sixty-seven thousand, five hundred sixty".