21507527007719 has 2 divisors, whose sum is σ = 21507527007720. Its totient is φ = 21507527007718.

The previous prime is 21507527007709. The next prime is 21507527007739. The reversal of 21507527007719 is 91770072570512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21507527007719 - 2⁴⁰ = 20408015379943 is a prime.

It is a super-2 number, since 2×21507527007719² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21507527007709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10753763503859 + 10753763503860.

It is an arithmetic number, because the mean of its divisors is an integer number (10753763503860).

Almost surely, 2^{21507527007719} is an apocalyptic number.

21507527007719 is a deficient number, since it is larger than the sum of its proper divisors (1).

21507527007719 is an equidigital number, since it uses as much as digits as its factorization.

21507527007719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160900, while the sum is 53.

The spelling of 21507527007719 in words is "twenty-one trillion, five hundred seven billion, five hundred twenty-seven million, seven thousand, seven hundred nineteen".