21323302013 has 16 divisors (see below), whose sum is σ = 23441179776. Its totient is φ = 19277058240.

The previous prime is 21323301953. The next prime is 21323302037. The reversal of 21323302013 is 31020332312.

It is a cyclic number.

It is not a de Polignac number, because 21323302013 - 2¹⁶ = 21323236477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323302073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79928 + ... + 221438.

It is an arithmetic number, because the mean of its divisors is an integer number (1465073736).

Almost surely, 2^21323302013 is an apocalyptic number.

It is an amenable number.

21323302013 is a deficient number, since it is larger than the sum of its proper divisors (2117877763).

21323302013 is a wasteful number, since it uses less digits than its factorization.

21323302013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141764.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21323302013 its reverse (31020332312), we get a palindrome (52343634325).

The spelling of 21323302013 in words is "twenty-one billion, three hundred twenty-three million, three hundred two thousand, thirteen".