21250445230603 has 2 divisors, whose sum is σ = 21250445230604. Its totient is φ = 21250445230602.

The previous prime is 21250445230591. The next prime is 21250445230639. The reversal of 21250445230603 is 30603254405212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21250445230603 - 2¹⁷ = 21250445099531 is a prime.

It is not a weakly prime, because it can be changed into another prime (21250445200603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625222615301 + 10625222615302.

It is an arithmetic number, because the mean of its divisors is an integer number (10625222615302).

Almost surely, 2^{21250445230603} is an apocalyptic number.

21250445230603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250445230603 is an equidigital number, since it uses as much as digits as its factorization.

21250445230603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 21250445230603 its reverse (30603254405212), we get a palindrome (51853699635815).

The spelling of 21250445230603 in words is "twenty-one trillion, two hundred fifty billion, four hundred forty-five million, two hundred thirty thousand, six hundred three".