21235803583 has 2 divisors, whose sum is σ = 21235803584. Its totient is φ = 21235803582.

The previous prime is 21235803559. The next prime is 21235803599. The reversal of 21235803583 is 38530853212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21235803583 - 2¹³ = 21235795391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21235803503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617901791 + 10617901792.

It is an arithmetic number, because the mean of its divisors is an integer number (10617901792).

Almost surely, 2^21235803583 is an apocalyptic number.

21235803583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21235803583 is an equidigital number, since it uses as much as digits as its factorization.

21235803583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 21235803583 in words is "twenty-one billion, two hundred thirty-five million, eight hundred three thousand, five hundred eighty-three".