21608019527 has 2 divisors, whose sum is σ = 21608019528. Its totient is φ = 21608019526.

The previous prime is 21608019479. The next prime is 21608019533. The reversal of 21608019527 is 72591080612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21608019527 - 2¹⁸ = 21607757383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21608019557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10804009763 + 10804009764.

It is an arithmetic number, because the mean of its divisors is an integer number (10804009764).

Almost surely, 2^21608019527 is an apocalyptic number.

21608019527 is a deficient number, since it is larger than the sum of its proper divisors (1).

21608019527 is an equidigital number, since it uses as much as digits as its factorization.

21608019527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 21608019527 in words is "twenty-one billion, six hundred eight million, nineteen thousand, five hundred twenty-seven".