20430525 has 12 divisors (see below), whose sum is σ = 33778592. Its totient is φ = 10896240.

The previous prime is 20430517. The next prime is 20430539. The reversal of 20430525 is 52503402.

It is not a de Polignac number, because 20430525 - 2³ = 20430517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136129 + ... + 136278.

Almost surely, 2^20430525 is an apocalyptic number.

20430525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20430525 is a deficient number, since it is larger than the sum of its proper divisors (13348067).

20430525 is a wasteful number, since it uses less digits than its factorization.

20430525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272420 (or 272415 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20430525 is about 4520.0138274125. The cubic root of 20430525 is about 273.3756585590.

Adding to 20430525 its reverse (52503402), we get a palindrome (72933927).

The spelling of 20430525 in words is "twenty million, four hundred thirty thousand, five hundred twenty-five".