21727672521619 has 2 divisors, whose sum is σ = 21727672521620. Its totient is φ = 21727672521618.

The previous prime is 21727672521497. The next prime is 21727672521623. The reversal of 21727672521619 is 91612527672712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21727672521619 - 2²⁹ = 21727135650707 is a prime.

It is a super-2 number, since 2×21727672521619² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21727672521689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10863836260809 + 10863836260810.

It is an arithmetic number, because the mean of its divisors is an integer number (10863836260810).

Almost surely, 2^{21727672521619} is an apocalyptic number.

21727672521619 is a deficient number, since it is larger than the sum of its proper divisors (1).

21727672521619 is an equidigital number, since it uses as much as digits as its factorization.

21727672521619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 58.

The spelling of 21727672521619 in words is "twenty-one trillion, seven hundred twenty-seven billion, six hundred seventy-two million, five hundred twenty-one thousand, six hundred nineteen".