21023032325 has 6 divisors (see below), whose sum is σ = 26068560114. Its totient is φ = 16818425840.

The previous prime is 21023032319. The next prime is 21023032361. The reversal of 21023032325 is 52323032012.

It can be written as a sum of positive squares in 3 ways, for example, as 863008129 + 20160024196 = 29377^2 + 141986^2 .

It is not a de Polignac number, because 21023032325 - 2²⁸ = 20754596869 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 21023032325.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 420460622 + ... + 420460671.

It is an arithmetic number, because the mean of its divisors is an integer number (4344760019).

Almost surely, 2^21023032325 is an apocalyptic number.

21023032325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21023032325 is a deficient number, since it is larger than the sum of its proper divisors (5045527789).

21023032325 is an equidigital number, since it uses as much as digits as its factorization.

21023032325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840921303 (or 840921298 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 21023032325 its reverse (52323032012), we get a palindrome (73346064337).

The spelling of 21023032325 in words is "twenty-one billion, twenty-three million, thirty-two thousand, three hundred twenty-five".