21324302045 has 8 divisors (see below), whose sum is σ = 25634138040. Its totient is φ = 17029457920.

The previous prime is 21324302033. The next prime is 21324302063. The reversal of 21324302045 is 54020342312.

It can be written as a sum of positive squares in 4 ways, for example, as 3444868249 + 17879433796 = 58693^2 + 133714^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21324302045 - 2²⁸ = 21055866589 is a prime.

It is a Curzon number.

It is a congruent number.

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, 3744836 + ... + 3750525.

It is an arithmetic number, because the mean of its divisors is an integer number (3204267255).

Almost surely, 2^21324302045 is an apocalyptic number.

It is an amenable number.

21324302045 is a deficient number, since it is larger than the sum of its proper divisors (4309835995).

21324302045 is an equidigital number, since it uses as much as digits as its factorization.

21324302045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7495935.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21324302045 its reverse (54020342312), we get a palindrome (75344644357).

The spelling of 21324302045 in words is "twenty-one billion, three hundred twenty-four million, three hundred two thousand, forty-five".