27020721719 has 2 divisors, whose sum is σ = 27020721720. Its totient is φ = 27020721718.

The previous prime is 27020721709. The next prime is 27020721817. The reversal of 27020721719 is 91712702072.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27020721719 - 2¹⁶ = 27020656183 is a prime.

It is a super-2 number, since 2×27020721719² (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 (27020721709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13510360859 + 13510360860.

It is an arithmetic number, because the mean of its divisors is an integer number (13510360860).

Almost surely, 2^27020721719 is an apocalyptic number.

27020721719 is a deficient number, since it is larger than the sum of its proper divisors (1).

27020721719 is an equidigital number, since it uses as much as digits as its factorization.

27020721719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 38.

The spelling of 27020721719 in words is "twenty-seven billion, twenty million, seven hundred twenty-one thousand, seven hundred nineteen".