20540325 has 24 divisors (see below), whose sum is σ = 36574048. Its totient is φ = 10111680.

The previous prime is 20540293. The next prime is 20540329. The reversal of 20540325 is 52304502.

It is not a de Polignac number, because 20540325 - 2⁵ = 20540293 is a prime.

It is a super-2 number, since 2×20540325² = 843809902211250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540329) 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, 9559 + ... + 11508.

Almost surely, 2^20540325 is an apocalyptic number.

20540325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20540325 is a deficient number, since it is larger than the sum of its proper divisors (16033723).

20540325 is a wasteful number, since it uses less digits than its factorization.

20540325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21093 (or 21088 counting only the distinct ones).

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

The square root of 20540325 is about 4532.1435325903. The cubic root of 20540325 is about 273.8645191300.

Adding to 20540325 its reverse (52304502), we get a palindrome (72844827).

The spelling of 20540325 in words is "twenty million, five hundred forty thousand, three hundred twenty-five".