21346430306 has 32 divisors (see below), whose sum is σ = 33325363200. Its totient is φ = 10244005200.

The previous prime is 21346430297. The next prime is 21346430309. The reversal of 21346430306 is 60303464312.

It is not an unprimeable number, because it can be changed into a prime (21346430309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4081265 + ... + 4086491.

It is an arithmetic number, because the mean of its divisors is an integer number (1041417600).

Almost surely, 2^21346430306 is an apocalyptic number.

21346430306 is a deficient number, since it is larger than the sum of its proper divisors (11978932894).

21346430306 is a wasteful number, since it uses less digits than its factorization.

21346430306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 21346430306 its reverse (60303464312), we get a palindrome (81649894618).

The spelling of 21346430306 in words is "twenty-one billion, three hundred forty-six million, four hundred thirty thousand, three hundred six".