21011319583 has 2 divisors, whose sum is σ = 21011319584. Its totient is φ = 21011319582.

The previous prime is 21011319493. The next prime is 21011319631. The reversal of 21011319583 is 38591311012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011319583 - 2²⁹ = 20474448671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011317583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505659791 + 10505659792.

It is an arithmetic number, because the mean of its divisors is an integer number (10505659792).

Almost surely, 2^21011319583 is an apocalyptic number.

21011319583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011319583 is an equidigital number, since it uses as much as digits as its factorization.

21011319583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 21011319583 in words is "twenty-one billion, eleven million, three hundred nineteen thousand, five hundred eighty-three".