21375673006671 has 6 divisors (see below), whose sum is σ = 30875972120760. Its totient is φ = 14250448671108.

The previous prime is 21375673006609. The next prime is 21375673006673. The reversal of 21375673006671 is 17660037657312.

21375673006671 is a `hidden beast` number, since 2 + 1 + 3 + 7 + 567 + 3 + 0 + 0 + 6 + 6 + 71 = 666.

It is not a de Polignac number, because 21375673006671 - 2¹⁵ = 21375672973903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375673006673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1187537389251 + ... + 1187537389268.

It is an arithmetic number, because the mean of its divisors is an integer number (5145995353460).

Almost surely, 2^{21375673006671} is an apocalyptic number.

21375673006671 is a deficient number, since it is larger than the sum of its proper divisors (9500299114089).

21375673006671 is a wasteful number, since it uses less digits than its factorization.

21375673006671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375074778525 (or 2375074778522 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 54.

The spelling of 21375673006671 in words is "twenty-one trillion, three hundred seventy-five billion, six hundred seventy-three million, six thousand, six hundred seventy-one".