21466273705 has 8 divisors (see below), whose sum is σ = 25770805632. Its totient is φ = 17165500848.

The previous prime is 21466273651. The next prime is 21466273723. The reversal of 21466273705 is 50737266412.

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 21466273705 - 2²¹ = 21464176553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927187 + ... + 950056.

It is an arithmetic number, because the mean of its divisors is an integer number (3221350704).

Almost surely, 2^21466273705 is an apocalyptic number.

It is an amenable number.

21466273705 is a deficient number, since it is larger than the sum of its proper divisors (4304531927).

21466273705 is a wasteful number, since it uses less digits than its factorization.

21466273705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879535.

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 21466273705 in words is "twenty-one billion, four hundred sixty-six million, two hundred seventy-three thousand, seven hundred five".