21272627263 has 2 divisors, whose sum is σ = 21272627264. Its totient is φ = 21272627262.

The previous prime is 21272627249. The next prime is 21272627279. The reversal of 21272627263 is 36272627212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21272627263 - 2²⁵ = 21239072831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21272627863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10636313631 + 10636313632.

It is an arithmetic number, because the mean of its divisors is an integer number (10636313632).

Almost surely, 2^21272627263 is an apocalyptic number.

21272627263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21272627263 is an equidigital number, since it uses as much as digits as its factorization.

21272627263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The spelling of 21272627263 in words is "twenty-one billion, two hundred seventy-two million, six hundred twenty-seven thousand, two hundred sixty-three".