20730325 has 48 divisors (see below), whose sum is σ = 32676480. Its totient is φ = 12777600.

The previous prime is 20730313. The next prime is 20730373. The reversal of 20730325 is 52303702.

It is a happy number.

It is not a de Polignac number, because 20730325 - 2¹⁹ = 20206037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20730296 and 20730305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232881 + ... + 232969.

It is an arithmetic number, because the mean of its divisors is an integer number (680760).

Almost surely, 2^20730325 is an apocalyptic number.

20730325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20730325 is a deficient number, since it is larger than the sum of its proper divisors (11946155).

20730325 is an equidigital number, since it uses as much as digits as its factorization.

20730325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 20730325 is about 4553.0566655819. The cubic root of 20730325 is about 274.7063532203.

The spelling of 20730325 in words is "twenty million, seven hundred thirty thousand, three hundred twenty-five".