21325344235 has 48 divisors (see below), whose sum is σ = 28444542336. Its totient is φ = 15257175552.

The previous prime is 21325344233. The next prime is 21325344251. The reversal of 21325344235 is 53244352312.

It is not a de Polignac number, because 21325344235 - 2¹ = 21325344233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21325344235.

It is not an unprimeable number, because it can be changed into a prime (21325344233) 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 47 ways as a sum of consecutive naturals, for example, 32657169 + ... + 32657821.

It is an arithmetic number, because the mean of its divisors is an integer number (592594632).

Almost surely, 2^21325344235 is an apocalyptic number.

21325344235 is a deficient number, since it is larger than the sum of its proper divisors (7119198101).

21325344235 is a wasteful number, since it uses less digits than its factorization.

21325344235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1075 counting only the distinct ones).

The product of its digits is 86400, while the sum is 34.

Adding to 21325344235 its reverse (53244352312), we get a palindrome (74569696547).

The spelling of 21325344235 in words is "twenty-one billion, three hundred twenty-five million, three hundred forty-four thousand, two hundred thirty-five".