20003425 has 24 divisors (see below), whose sum is σ = 27177080. Its totient is φ = 14515200.

The previous prime is 20003393. The next prime is 20003443. The reversal of 20003425 is 52430002.

It can be written as a sum of positive squares in 12 ways, for example, as 16378209 + 3625216 = 4047^2 + 1904^2 .

It is not a de Polignac number, because 20003425 - 2⁵ = 20003393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20003399 and 20003408.

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 23 ways as a sum of consecutive naturals, for example, 19321 + ... + 20329.

Almost surely, 2^20003425 is an apocalyptic number.

20003425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20003425 is a deficient number, since it is larger than the sum of its proper divisors (7173655).

20003425 is a wasteful number, since it uses less digits than its factorization.

20003425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20003425 is about 4472.5188652481. The cubic root of 20003425 is about 271.4572555756.

Adding to 20003425 its reverse (52430002), we get a palindrome (72433427).

The spelling of 20003425 in words is "twenty million, three thousand, four hundred twenty-five".