21432102343 has 2 divisors, whose sum is σ = 21432102344. Its totient is φ = 21432102342.

The previous prime is 21432102331. The next prime is 21432102347. The reversal of 21432102343 is 34320123412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21432102343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21432102347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716051171 + 10716051172.

It is an arithmetic number, because the mean of its divisors is an integer number (10716051172).

Almost surely, 2^21432102343 is an apocalyptic number.

21432102343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432102343 is an equidigital number, since it uses as much as digits as its factorization.

21432102343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21432102343 its reverse (34320123412), we get a palindrome (55752225755).

The spelling of 21432102343 in words is "twenty-one billion, four hundred thirty-two million, one hundred two thousand, three hundred forty-three".