20013777361361 has 8 divisors (see below), whose sum is σ = 22872993538944. Its totient is φ = 17154587465280.

The previous prime is 20013777361343. The next prime is 20013777361363. The reversal of 20013777361361 is 16316377731002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013777361361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013777361363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4910600 + ... + 8008841.

It is an arithmetic number, because the mean of its divisors is an integer number (2859124192368).

Almost surely, 2^{20013777361361} is an apocalyptic number.

It is an amenable number.

20013777361361 is a deficient number, since it is larger than the sum of its proper divisors (2859216177583).

20013777361361 is a wasteful number, since it uses less digits than its factorization.

20013777361361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13140751.

The product of its (nonzero) digits is 666792, while the sum is 47.

The spelling of 20013777361361 in words is "twenty trillion, thirteen billion, seven hundred seventy-seven million, three hundred sixty-one thousand, three hundred sixty-one".