21727306286 has 12 divisors (see below), whose sum is σ = 37911932568. Its totient is φ = 9311702652.

The previous prime is 21727306277. The next prime is 21727306301. The reversal of 21727306286 is 68260372712.

It is a super-2 number, since 2×21727306286² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110853506 + ... + 110853701.

It is an arithmetic number, because the mean of its divisors is an integer number (3159327714).

Almost surely, 2^21727306286 is an apocalyptic number.

21727306286 is a deficient number, since it is larger than the sum of its proper divisors (16184626282).

21727306286 is a wasteful number, since it uses less digits than its factorization.

21727306286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221707223 (or 221707216 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

Adding to 21727306286 its reverse (68260372712), we get a palindrome (89987678998).

The spelling of 21727306286 in words is "twenty-one billion, seven hundred twenty-seven million, three hundred six thousand, two hundred eighty-six".