21301649679 has 8 divisors (see below), whose sum is σ = 28566374832. Its totient is φ = 14119012160.

The previous prime is 21301649651. The next prime is 21301649693. The reversal of 21301649679 is 97694610312.

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

It is a cyclic number.

It is not a de Polignac number, because 21301649679 - 2⁸ = 21301649423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301649639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20521302 + ... + 20522339.

It is an arithmetic number, because the mean of its divisors is an integer number (3570796854).

Almost surely, 2^21301649679 is an apocalyptic number.

21301649679 is a deficient number, since it is larger than the sum of its proper divisors (7264725153).

21301649679 is a wasteful number, since it uses less digits than its factorization.

21301649679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41043817.

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 21301649679 in words is "twenty-one billion, three hundred one million, six hundred forty-nine thousand, six hundred seventy-nine".