21232465427 has 2 divisors, whose sum is σ = 21232465428. Its totient is φ = 21232465426.

The previous prime is 21232465357. The next prime is 21232465511. The reversal of 21232465427 is 72456423212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21232465427 - 2⁸ = 21232465171 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222465427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616232713 + 10616232714.

It is an arithmetic number, because the mean of its divisors is an integer number (10616232714).

Almost surely, 2^21232465427 is an apocalyptic number.

21232465427 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232465427 is an equidigital number, since it uses as much as digits as its factorization.

21232465427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 38.

Adding to 21232465427 its reverse (72456423212), we get a palindrome (93688888639).

The spelling of 21232465427 in words is "twenty-one billion, two hundred thirty-two million, four hundred sixty-five thousand, four hundred twenty-seven".