20886645070081 has 64 divisors (see below), whose sum is σ = 27144350318592. Its totient is φ = 15647920561152.

The previous prime is 20886645070061. The next prime is 20886645070087. The reversal of 20886645070081 is 18007054668802.

It is not a de Polignac number, because 20886645070081 - 2¹⁷ = 20886644939009 is a prime.

It is a super-2 number, since 2×20886645070081² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20886645070087) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47071800 + ... + 47513446.

It is an arithmetic number, because the mean of its divisors is an integer number (424130473728).

Almost surely, 2^{20886645070081} is an apocalyptic number.

It is an amenable number.

20886645070081 is a deficient number, since it is larger than the sum of its proper divisors (6257705248511).

20886645070081 is a wasteful number, since it uses less digits than its factorization.

20886645070081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442198.

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 20886645070081 in words is "twenty trillion, eight hundred eighty-six billion, six hundred forty-five million, seventy thousand, eighty-one".