20343425 has 12 divisors (see below), whose sum is σ = 25282236. Its totient is φ = 16238400.

The previous prime is 20343419. The next prime is 20343473. The reversal of 20343425 is 52434302.

It can be written as a sum of positive squares in 6 ways, for example, as 237169 + 20106256 = 487^2 + 4484^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20343425 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 20343425.

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, 19415 + ... + 20435.

It is an arithmetic number, because the mean of its divisors is an integer number (2106853).

Almost surely, 2^20343425 is an apocalyptic number.

20343425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20343425 is a deficient number, since it is larger than the sum of its proper divisors (4938811).

20343425 is a wasteful number, since it uses less digits than its factorization.

20343425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828 (or 1823 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20343425 is about 4510.3686102136. The cubic root of 20343425 is about 272.9866175284.

Adding to 20343425 its reverse (52434302), we get a palindrome (72777727).

The spelling of 20343425 in words is "twenty million, three hundred forty-three thousand, four hundred twenty-five".