20280325 has 12 divisors (see below), whose sum is σ = 27082468. Its totient is φ = 14976000.

The previous prime is 20280311. The next prime is 20280347. The reversal of 20280325 is 52308202.

It can be written as a sum of positive squares in 6 ways, for example, as 12321 + 20268004 = 111^2 + 4502^2 .

It is not a de Polignac number, because 20280325 - 2²¹ = 18183173 is a prime.

It is a super-2 number, since 2×20280325² = 822583164211250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20280296 and 20280305.

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 11 ways as a sum of consecutive naturals, for example, 30876 + ... + 31525.

Almost surely, 2^20280325 is an apocalyptic number.

20280325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20280325 is a deficient number, since it is larger than the sum of its proper divisors (6802143).

20280325 is a wasteful number, since it uses less digits than its factorization.

20280325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62424 (or 62419 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20280325 is about 4503.3681839263. The cubic root of 20280325 is about 272.7040807720.

Adding to 20280325 its reverse (52308202), we get a palindrome (72588527).

The spelling of 20280325 in words is "twenty million, two hundred eighty thousand, three hundred twenty-five".