21272627247 has 16 divisors (see below), whose sum is σ = 29217646080. Its totient is φ = 13758545600.

The previous prime is 21272627219. The next prime is 21272627249. The reversal of 21272627247 is 74272627212.

It is a cyclic number.

It is not a de Polignac number, because 21272627247 - 2¹⁹ = 21272102959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21272627199 and 21272627208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21272627249) 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 15 ways as a sum of consecutive naturals, for example, 461079 + ... + 505112.

It is an arithmetic number, because the mean of its divisors is an integer number (1826102880).

Almost surely, 2^21272627247 is an apocalyptic number.

21272627247 is a deficient number, since it is larger than the sum of its proper divisors (7945018833).

21272627247 is a wasteful number, since it uses less digits than its factorization.

21272627247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966414.

The product of its digits is 263424, while the sum is 42.

The spelling of 21272627247 in words is "twenty-one billion, two hundred seventy-two million, six hundred twenty-seven thousand, two hundred forty-seven".