21651346327307 has 2 divisors, whose sum is σ = 21651346327308. Its totient is φ = 21651346327306.

The previous prime is 21651346327207. The next prime is 21651346327337. The reversal of 21651346327307 is 70372364315612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21651346327307 - 2¹⁰ = 21651346326283 is a prime.

It is not a weakly prime, because it can be changed into another prime (21651346327337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10825673163653 + 10825673163654.

It is an arithmetic number, because the mean of its divisors is an integer number (10825673163654).

Almost surely, 2^{21651346327307} is an apocalyptic number.

21651346327307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21651346327307 is an equidigital number, since it uses as much as digits as its factorization.

21651346327307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 50.

The spelling of 21651346327307 in words is "twenty-one trillion, six hundred fifty-one billion, three hundred forty-six million, three hundred twenty-seven thousand, three hundred seven".