20430025 has 24 divisors (see below), whose sum is σ = 31587264. Its totient is φ = 12734400.

The previous prime is 20429993. The next prime is 20430029. The reversal of 20430025 is 52003402.

It is not a de Polignac number, because 20430025 - 2⁵ = 20429993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20429990 and 20430008.

It is not an unprimeable number, because it can be changed into a prime (20430029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3382 + ... + 7231.

It is an arithmetic number, because the mean of its divisors is an integer number (1316136).

Almost surely, 2^20430025 is an apocalyptic number.

20430025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20430025 is a deficient number, since it is larger than the sum of its proper divisors (11157239).

20430025 is a wasteful number, since it uses less digits than its factorization.

20430025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10641 (or 10636 counting only the distinct ones).

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

The square root of 20430025 is about 4519.9585175088. The cubic root of 20430025 is about 273.3734284166.

Adding to 20430025 its reverse (52003402), we get a palindrome (72433427).

The spelling of 20430025 in words is "twenty million, four hundred thirty thousand, twenty-five".