20330725 has 12 divisors (see below), whose sum is σ = 26693604. Its totient is φ = 15307520.

The previous prime is 20330693. The next prime is 20330731. The reversal of 20330725 is 52703302.

20330725 = 613² + 614² + ... + 662².

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 134689 + 20196036 = 367^2 + 4494^2 .

It is not a de Polignac number, because 20330725 - 2⁵ = 20330693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20330696 and 20330705.

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 11 ways as a sum of consecutive naturals, for example, 23494 + ... + 24343.

It is an arithmetic number, because the mean of its divisors is an integer number (2224467).

Almost surely, 2^20330725 is an apocalyptic number.

20330725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20330725 is a deficient number, since it is larger than the sum of its proper divisors (6362879).

20330725 is a wasteful number, since it uses less digits than its factorization.

20330725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47864 (or 47859 counting only the distinct ones).

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

The square root of 20330725 is about 4508.9605232248. The cubic root of 20330725 is about 272.9297989783.

The spelling of 20330725 in words is "twenty million, three hundred thirty thousand, seven hundred twenty-five".