20543515521211 has 8 divisors (see below), whose sum is σ = 21752516383920. Its totient is φ = 19334576744448.

The previous prime is 20543515521187. The next prime is 20543515521337. The reversal of 20543515521211 is 11212551534502.

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

It is a cyclic number.

It is not a de Polignac number, because 20543515521211 - 2⁷ = 20543515521083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20543515531211) 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, 14839381 + ... + 16164598.

It is an arithmetic number, because the mean of its divisors is an integer number (2719064547990).

Almost surely, 2^{20543515521211} is an apocalyptic number.

20543515521211 is a deficient number, since it is larger than the sum of its proper divisors (1209000862709).

20543515521211 is a wasteful number, since it uses less digits than its factorization.

20543515521211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31042973.

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 20543515521211 in words is "twenty trillion, five hundred forty-three billion, five hundred fifteen million, five hundred twenty-one thousand, two hundred eleven".