27020721797 has 16 divisors (see below), whose sum is σ = 28553699328. Its totient is φ = 25529621040.

The previous prime is 27020721719. The next prime is 27020721817. The reversal of 27020721797 is 79712702072.

It is a cyclic number.

It is not a de Polignac number, because 27020721797 - 2¹⁰ = 27020720773 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27020711797) 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, 5893568 + ... + 5898150.

It is an arithmetic number, because the mean of its divisors is an integer number (1784606208).

Almost surely, 2^27020721797 is an apocalyptic number.

It is an amenable number.

27020721797 is a deficient number, since it is larger than the sum of its proper divisors (1532977531).

27020721797 is a wasteful number, since it uses less digits than its factorization.

27020721797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080.

The product of its (nonzero) digits is 172872, while the sum is 44.

The spelling of 27020721797 in words is "twenty-seven billion, twenty million, seven hundred twenty-one thousand, seven hundred ninety-seven".