21476636702117 has 4 divisors (see below), whose sum is σ = 21536460203040. Its totient is φ = 21416813201196.

The previous prime is 21476636702057. The next prime is 21476636702123. The reversal of 21476636702117 is 71120763667412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21476636702117 - 2²⁰ = 21476635653541 is a prime.

It is a super-2 number, since 2×21476636702117² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21476636702167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29911749923 + ... + 29911750640.

It is an arithmetic number, because the mean of its divisors is an integer number (5384115050760).

Almost surely, 2^{21476636702117} is an apocalyptic number.

It is an amenable number.

21476636702117 is a deficient number, since it is larger than the sum of its proper divisors (59823500923).

21476636702117 is an equidigital number, since it uses as much as digits as its factorization.

21476636702117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59823500922.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 21476636702117 in words is "twenty-one trillion, four hundred seventy-six billion, six hundred thirty-six million, seven hundred two thousand, one hundred seventeen".