21532132439 has 2 divisors, whose sum is σ = 21532132440. Its totient is φ = 21532132438.

The previous prime is 21532132421. The next prime is 21532132469. The reversal of 21532132439 is 93423123512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21532132439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21532132399 and 21532132408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21532132469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10766066219 + 10766066220.

It is an arithmetic number, because the mean of its divisors is an integer number (10766066220).

Almost surely, 2^21532132439 is an apocalyptic number.

21532132439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21532132439 is an equidigital number, since it uses as much as digits as its factorization.

21532132439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The spelling of 21532132439 in words is "twenty-one billion, five hundred thirty-two million, one hundred thirty-two thousand, four hundred thirty-nine".