21106176813 has 12 divisors (see below), whose sum is σ = 30488065920. Its totient is φ = 14070154056.

The previous prime is 21106176739. The next prime is 21106176857. The reversal of 21106176813 is 31867160112.

21106176813 is a `hidden beast` number, since 21 + 1 + 0 + 617 + 6 + 8 + 13 = 666.

It is not a de Polignac number, because 21106176813 - 2⁸ = 21106176557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21106176893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252970 + ... + 325892.

It is an arithmetic number, because the mean of its divisors is an integer number (2540672160).

Almost surely, 2^21106176813 is an apocalyptic number.

It is an amenable number.

21106176813 is a deficient number, since it is larger than the sum of its proper divisors (9381889107).

21106176813 is a wasteful number, since it uses less digits than its factorization.

21106176813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105088 (or 105085 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 21106176813 in words is "twenty-one billion, one hundred six million, one hundred seventy-six thousand, eight hundred thirteen".