21746658610879 has 8 divisors (see below), whose sum is σ = 21793603847760. Its totient is φ = 21699724166400.

The previous prime is 21746658610871. The next prime is 21746658610891. The reversal of 21746658610879 is 97801685664712.

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 21746658610879 - 2³ = 21746658610871 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 (21746658610871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342767 + ... + 6730255.

It is an arithmetic number, because the mean of its divisors is an integer number (2724200480970).

Almost surely, 2^{21746658610879} is an apocalyptic number.

21746658610879 is a deficient number, since it is larger than the sum of its proper divisors (46945236881).

21746658610879 is an equidigital number, since it uses as much as digits as its factorization.

21746658610879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396201.

The product of its (nonzero) digits is 243855360, while the sum is 70.

The spelling of 21746658610879 in words is "twenty-one trillion, seven hundred forty-six billion, six hundred fifty-eight million, six hundred ten thousand, eight hundred seventy-nine".