21630142130579 has 2 divisors, whose sum is σ = 21630142130580. Its totient is φ = 21630142130578.

The previous prime is 21630142130537. The next prime is 21630142130581. The reversal of 21630142130579 is 97503124103612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21630142130579 - 2¹⁶ = 21630142065043 is a prime.

Together with 21630142130581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21630142100579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10815071065289 + 10815071065290.

It is an arithmetic number, because the mean of its divisors is an integer number (10815071065290).

Almost surely, 2^{21630142130579} is an apocalyptic number.

21630142130579 is a deficient number, since it is larger than the sum of its proper divisors (1).

21630142130579 is an equidigital number, since it uses as much as digits as its factorization.

21630142130579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 21630142130579 in words is "twenty-one trillion, six hundred thirty billion, one hundred forty-two million, one hundred thirty thousand, five hundred seventy-nine".