21072630343 has 2 divisors, whose sum is σ = 21072630344. Its totient is φ = 21072630342.

The previous prime is 21072630331. The next prime is 21072630367. The reversal of 21072630343 is 34303627012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21072630343 - 2⁵ = 21072630311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21072630443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536315171 + 10536315172.

It is an arithmetic number, because the mean of its divisors is an integer number (10536315172).

Almost surely, 2^21072630343 is an apocalyptic number.

21072630343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21072630343 is an equidigital number, since it uses as much as digits as its factorization.

21072630343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 31.

The spelling of 21072630343 in words is "twenty-one billion, seventy-two million, six hundred thirty thousand, three hundred forty-three".