21112023593 has 2 divisors, whose sum is σ = 21112023594. Its totient is φ = 21112023592.

The previous prime is 21112023557. The next prime is 21112023607. The reversal of 21112023593 is 39532021112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19232974489 + 1879049104 = 138683^2 + 43348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112023593 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112023533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556011796 + 10556011797.

It is an arithmetic number, because the mean of its divisors is an integer number (10556011797).

Almost surely, 2^21112023593 is an apocalyptic number.

It is an amenable number.

21112023593 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112023593 is an equidigital number, since it uses as much as digits as its factorization.

21112023593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 21112023593 in words is "twenty-one billion, one hundred twelve million, twenty-three thousand, five hundred ninety-three".