21671681673092 has 12 divisors (see below), whose sum is σ = 41373210466896. Its totient is φ = 9850764396840.

The previous prime is 21671681673079. The next prime is 21671681673097. The reversal of 21671681673092 is 29037618617612.

It is not an unprimeable number, because it can be changed into a prime (21671681673097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246269109878 + ... + 246269109965.

It is an arithmetic number, because the mean of its divisors is an integer number (3447767538908).

Almost surely, 2^{21671681673092} is an apocalyptic number.

21671681673092 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21671681673092 is a deficient number, since it is larger than the sum of its proper divisors (19701528793804).

21671681673092 is a wasteful number, since it uses less digits than its factorization.

21671681673092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492538219858 (or 492538219856 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 21671681673092 in words is "twenty-one trillion, six hundred seventy-one billion, six hundred eighty-one million, six hundred seventy-three thousand, ninety-two".