21745572469683 has 4 divisors (see below), whose sum is σ = 28994096626248. Its totient is φ = 14497048313120.

The previous prime is 21745572469661. The next prime is 21745572469727. The reversal of 21745572469683 is 38696427554712.

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 21745572469683 - 2⁹ = 21745572469171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21745572469613) 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, 3624262078278 + ... + 3624262078283.

It is an arithmetic number, because the mean of its divisors is an integer number (7248524156562).

Almost surely, 2^{21745572469683} is an apocalyptic number.

21745572469683 is a deficient number, since it is larger than the sum of its proper divisors (7248524156565).

21745572469683 is an equidigital number, since it uses as much as digits as its factorization.

21745572469683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7248524156564.

The product of its digits is 609638400, while the sum is 69.

The spelling of 21745572469683 in words is "twenty-one trillion, seven hundred forty-five billion, five hundred seventy-two million, four hundred sixty-nine thousand, six hundred eighty-three".