21930238063 has 2 divisors, whose sum is σ = 21930238064. Its totient is φ = 21930238062.

The previous prime is 21930238027. The next prime is 21930238079. The reversal of 21930238063 is 36083203912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21930238063 - 2²⁵ = 21896683631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21930238763) 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, 10965119031 + 10965119032.

It is an arithmetic number, because the mean of its divisors is an integer number (10965119032).

Almost surely, 2^21930238063 is an apocalyptic number.

21930238063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21930238063 is an equidigital number, since it uses as much as digits as its factorization.

21930238063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 21930238063 in words is "twenty-one billion, nine hundred thirty million, two hundred thirty-eight thousand, sixty-three".