21768703004071 has 4 divisors (see below), whose sum is σ = 21818977145392. Its totient is φ = 21718428862752.

The previous prime is 21768703004063. The next prime is 21768703004093. The reversal of 21768703004071 is 17040030786712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21768703004071 - 2³ = 21768703004063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21768703004051) 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, 25137070011 + ... + 25137070876.

It is an arithmetic number, because the mean of its divisors is an integer number (5454744286348).

Almost surely, 2^{21768703004071} is an apocalyptic number.

21768703004071 is a deficient number, since it is larger than the sum of its proper divisors (50274141321).

21768703004071 is an equidigital number, since it uses as much as digits as its factorization.

21768703004071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50274141320.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 21768703004071 in words is "twenty-one trillion, seven hundred sixty-eight billion, seven hundred three million, four thousand, seventy-one".