20051747133171 has 32 divisors (see below), whose sum is σ = 28917517466880. Its totient is φ = 12285955803264.

The previous prime is 20051747133167. The next prime is 20051747133211. The reversal of 20051747133171 is 17133174715002.

It is not a de Polignac number, because 20051747133171 - 2² = 20051747133167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20051747133071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8158345 + ... + 10327733.

It is an arithmetic number, because the mean of its divisors is an integer number (903672420840).

Almost surely, 2^{20051747133171} is an apocalyptic number.

20051747133171 is a deficient number, since it is larger than the sum of its proper divisors (8865770333709).

20051747133171 is a wasteful number, since it uses less digits than its factorization.

20051747133171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170435.

The product of its (nonzero) digits is 123480, while the sum is 42.

The spelling of 20051747133171 in words is "twenty trillion, fifty-one billion, seven hundred forty-seven million, one hundred thirty-three thousand, one hundred seventy-one".