20203425 has 60 divisors (see below), whose sum is σ = 40870896. Its totient is φ = 9784800.

The previous prime is 20203423. The next prime is 20203427. The reversal of 20203425 is 52430202.

20203425 = 611² + 612² + ... + 660².

It is an interprime number because it is at equal distance from previous prime (20203423) and next prime (20203427).

It is not a de Polignac number, because 20203425 - 2¹ = 20203423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20203398 and 20203407.

It is not an unprimeable number, because it can be changed into a prime (20203423) by changing a digit.

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 59 ways as a sum of consecutive naturals, for example, 21822 + ... + 22728.

Almost surely, 2^20203425 is an apocalyptic number.

20203425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20203425 is an abundant number, since it is smaller than the sum of its proper divisors (20667471).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20203425 is a wasteful number, since it uses less digits than its factorization.

20203425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20203425 is about 4494.8220209481. The cubic root of 20203425 is about 272.3589596422.

Adding to 20203425 its reverse (52430202), we get a palindrome (72633627).

It can be divided in two parts, 2020 and 3425, that added together give a palindrome (5445).

The spelling of 20203425 in words is "twenty million, two hundred three thousand, four hundred twenty-five".