21630267315379 has 2 divisors, whose sum is σ = 21630267315380. Its totient is φ = 21630267315378.

The previous prime is 21630267315367. The next prime is 21630267315407. The reversal of 21630267315379 is 97351376203612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21630267315379 is a prime.

It is not a weakly prime, because it can be changed into another prime (21630267315079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10815133657689 + 10815133657690.

It is an arithmetic number, because the mean of its divisors is an integer number (10815133657690).

Almost surely, 2^{21630267315379} is an apocalyptic number.

21630267315379 is a deficient number, since it is larger than the sum of its proper divisors (1).

21630267315379 is an equidigital number, since it uses as much as digits as its factorization.

21630267315379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8573040, while the sum is 55.

The spelling of 21630267315379 in words is "twenty-one trillion, six hundred thirty billion, two hundred sixty-seven million, three hundred fifteen thousand, three hundred seventy-nine".