21262248523 has 2 divisors, whose sum is σ = 21262248524. Its totient is φ = 21262248522.

The previous prime is 21262248499. The next prime is 21262248533. The reversal of 21262248523 is 32584226212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21262248523 - 2⁹ = 21262248011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21262248533) 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, 10631124261 + 10631124262.

It is an arithmetic number, because the mean of its divisors is an integer number (10631124262).

Almost surely, 2^21262248523 is an apocalyptic number.

21262248523 is a deficient number, since it is larger than the sum of its proper divisors (1).

21262248523 is an equidigital number, since it uses as much as digits as its factorization.

21262248523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 37.

The spelling of 21262248523 in words is "twenty-one billion, two hundred sixty-two million, two hundred forty-eight thousand, five hundred twenty-three".