21476517166701 has 12 divisors (see below), whose sum is σ = 31021676272860. Its totient is φ = 14317659480960.

The previous prime is 21476517166691. The next prime is 21476517166721. The reversal of 21476517166701 is 10766171567412.

21476517166701 is a `hidden beast` number, since 2 + 1 + 47 + 6 + 517 + 16 + 6 + 70 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6781331601801 + 14695185564900 = 2604099^2 + 3833430^2 .

It is not a de Polignac number, because 21476517166701 - 2⁵ = 21476517166669 is a prime.

It is a super-2 number, since 2×21476517166701² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21476517166721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11723935 + ... + 13431443.

It is an arithmetic number, because the mean of its divisors is an integer number (2585139689405).

Almost surely, 2^{21476517166701} is an apocalyptic number.

It is an amenable number.

21476517166701 is a deficient number, since it is larger than the sum of its proper divisors (9545159106159).

21476517166701 is a wasteful number, since it uses less digits than its factorization.

21476517166701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105036 (or 3105033 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 21476517166701 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred seventeen million, one hundred sixty-six thousand, seven hundred one".