21354544606627 has 2 divisors, whose sum is σ = 21354544606628. Its totient is φ = 21354544606626.

The previous prime is 21354544606613. The next prime is 21354544606663. The reversal of 21354544606627 is 72660644545312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21354544606627 is a prime.

It is not a weakly prime, because it can be changed into another prime (21354544606607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677272303313 + 10677272303314.

It is an arithmetic number, because the mean of its divisors is an integer number (10677272303314).

Almost surely, 2^{21354544606627} is an apocalyptic number.

21354544606627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21354544606627 is an equidigital number, since it uses as much as digits as its factorization.

21354544606627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29030400, while the sum is 55.

The spelling of 21354544606627 in words is "twenty-one trillion, three hundred fifty-four billion, five hundred forty-four million, six hundred six thousand, six hundred twenty-seven".