21742651260634 has 8 divisors (see below), whose sum is σ = 32729220626400. Its totient is φ = 10832911051836.

The previous prime is 21742651260619. The next prime is 21742651260637. The reversal of 21742651260634 is 43606215624712.

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

It is not an unprimeable number, because it can be changed into a prime (21742651260637) 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, 19207288534 + ... + 19207289665.

It is an arithmetic number, because the mean of its divisors is an integer number (4091152578300).

Almost surely, 2^{21742651260634} is an apocalyptic number.

21742651260634 is a deficient number, since it is larger than the sum of its proper divisors (10986569365766).

21742651260634 is a wasteful number, since it uses less digits than its factorization.

21742651260634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38414578484.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 21742651260634 in words is "twenty-one trillion, seven hundred forty-two billion, six hundred fifty-one million, two hundred sixty thousand, six hundred thirty-four".