21671681673094 has 8 divisors (see below), whose sum is σ = 32508005427360. Its totient is φ = 10835679863976.

The previous prime is 21671681673079. The next prime is 21671681673097. The reversal of 21671681673094 is 49037618617612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21671681673097) 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, 80317929 + ... + 80587300.

It is an arithmetic number, because the mean of its divisors is an integer number (4063500678420).

Almost surely, 2^{21671681673094} is an apocalyptic number.

21671681673094 is a deficient number, since it is larger than the sum of its proper divisors (10836323754266).

21671681673094 is a wasteful number, since it uses less digits than its factorization.

21671681673094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160972574.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 21671681673094 in words is "twenty-one trillion, six hundred seventy-one billion, six hundred eighty-one million, six hundred seventy-three thousand, ninety-four".