21267270705 has 8 divisors (see below), whose sum is σ = 34027633152. Its totient is φ = 11342544368.

The previous prime is 21267270701. The next prime is 21267270709. The reversal of 21267270705 is 50707276212.

It is an interprime number because it is at equal distance from previous prime (21267270701) and next prime (21267270709).

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 21267270705 - 2² = 21267270701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21267270701) 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, 708909009 + ... + 708909038.

It is an arithmetic number, because the mean of its divisors is an integer number (4253454144).

Almost surely, 2^21267270705 is an apocalyptic number.

It is an amenable number.

21267270705 is a deficient number, since it is larger than the sum of its proper divisors (12760362447).

21267270705 is a wasteful number, since it uses less digits than its factorization.

21267270705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417818055.

The product of its (nonzero) digits is 82320, while the sum is 39.

The spelling of 21267270705 in words is "twenty-one billion, two hundred sixty-seven million, two hundred seventy thousand, seven hundred five".