21323303007 has 4 divisors (see below), whose sum is σ = 28431070680. Its totient is φ = 14215535336.

The previous prime is 21323303003. The next prime is 21323303009. The reversal of 21323303007 is 70030332312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21323303007 - 2² = 21323303003 is a prime.

It is a super-2 number, since 2×21323303007² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323303003) 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 3 ways as a sum of consecutive naturals, for example, 3553883832 + ... + 3553883837.

It is an arithmetic number, because the mean of its divisors is an integer number (7107767670).

Almost surely, 2^21323303007 is an apocalyptic number.

21323303007 is a deficient number, since it is larger than the sum of its proper divisors (7107767673).

21323303007 is an equidigital number, since it uses as much as digits as its factorization.

21323303007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107767672.

The product of its (nonzero) digits is 2268, while the sum is 24.

Adding to 21323303007 its reverse (70030332312), we get a palindrome (91353635319).

The spelling of 21323303007 in words is "twenty-one billion, three hundred twenty-three million, three hundred three thousand, seven".