21305213114 has 16 divisors (see below), whose sum is σ = 33799253280. Its totient is φ = 10044110160.

The previous prime is 21305213101. The next prime is 21305213131. The reversal of 21305213114 is 41131250312.

It is a self number, because there is not a number n which added to its sum of digits gives 21305213114.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320569 + ... + 1336604.

It is an arithmetic number, because the mean of its divisors is an integer number (2112453330).

Almost surely, 2^21305213114 is an apocalyptic number.

21305213114 is a deficient number, since it is larger than the sum of its proper divisors (12494040166).

21305213114 is a wasteful number, since it uses less digits than its factorization.

21305213114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657405.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21305213114 its reverse (41131250312), we get a palindrome (62436463426).

The spelling of 21305213114 in words is "twenty-one billion, three hundred five million, two hundred thirteen thousand, one hundred fourteen".