21303323025 has 24 divisors (see below), whose sum is σ = 35239973664. Its totient is φ = 11355811200.

The previous prime is 21303323017. The next prime is 21303323029. The reversal of 21303323025 is 52032330312.

It is not a de Polignac number, because 21303323025 - 2³ = 21303323017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21303322986 and 21303323004.

It is not an unprimeable number, because it can be changed into a prime (21303323029) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 71277 + ... + 218373.

It is an arithmetic number, because the mean of its divisors is an integer number (1468332236).

Almost surely, 2^21303323025 is an apocalyptic number.

21303323025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21303323025 is a deficient number, since it is larger than the sum of its proper divisors (13936650639).

21303323025 is a wasteful number, since it uses less digits than its factorization.

21303323025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149041 (or 149036 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

Adding to 21303323025 its reverse (52032330312), we get a palindrome (73335653337).

The spelling of 21303323025 in words is "twenty-one billion, three hundred three million, three hundred twenty-three thousand, twenty-five".