20144425 has 24 divisors (see below), whose sum is σ = 29222336. Its totient is φ = 13487040.

The previous prime is 20144417. The next prime is 20144437. The reversal of 20144425 is 52444102.

It is a happy number.

It is not a de Polignac number, because 20144425 - 2³ = 20144417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20144396 and 20144405.

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, 6187 + ... + 8863.

Almost surely, 2^20144425 is an apocalyptic number.

20144425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20144425 is a deficient number, since it is larger than the sum of its proper divisors (9077911).

20144425 is a wasteful number, since it uses less digits than its factorization.

20144425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737 (or 2732 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 20144425 is about 4488.2541149093. The cubic root of 20144425 is about 272.0935781321.

Adding to 20144425 its reverse (52444102), we get a palindrome (72588527).

The spelling of 20144425 in words is "twenty million, one hundred forty-four thousand, four hundred twenty-five".