21272627270 has 16 divisors (see below), whose sum is σ = 38297361168. Its totient is φ = 8507577120.

The previous prime is 21272627263. The next prime is 21272627279. The reversal of 21272627270 is 7272627212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21272627279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122621 + ... + 239960.

It is an arithmetic number, because the mean of its divisors is an integer number (2393585073).

Almost surely, 2^21272627270 is an apocalyptic number.

21272627270 is a deficient number, since it is larger than the sum of its proper divisors (17024733898).

21272627270 is a wasteful number, since it uses less digits than its factorization.

21272627270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368455.

The product of its (nonzero) digits is 65856, while the sum is 38.

The spelling of 21272627270 in words is "twenty-one billion, two hundred seventy-two million, six hundred twenty-seven thousand, two hundred seventy".