27093654821 has 2 divisors, whose sum is σ = 27093654822. Its totient is φ = 27093654820.

The previous prime is 27093654761. The next prime is 27093654829. The reversal of 27093654821 is 12845639072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26539993921 + 553660900 = 162911^2 + 23530^2 .

It is a cyclic number.

It is not a de Polignac number, because 27093654821 - 2¹⁴ = 27093638437 is a prime.

It is a super-2 number, since 2×27093654821² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27093654829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13546827410 + 13546827411.

It is an arithmetic number, because the mean of its divisors is an integer number (13546827411).

It is a 2-persistent number, because it is pandigital, and so is 2⋅27093654821 = 54187309642, but 3⋅27093654821 = 81280964463 is not.

Almost surely, 2^27093654821 is an apocalyptic number.

It is an amenable number.

27093654821 is a deficient number, since it is larger than the sum of its proper divisors (1).

27093654821 is an equidigital number, since it uses as much as digits as its factorization.

27093654821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 27093654821 in words is "twenty-seven billion, ninety-three million, six hundred fifty-four thousand, eight hundred twenty-one".