20490325 has 12 divisors (see below), whose sum is σ = 25479520. Its totient is φ = 16346160.

The previous prime is 20490319. The next prime is 20490343. The reversal of 20490325 is 52309402.

It is a happy number.

It is not a de Polignac number, because 20490325 - 2⁹ = 20489813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 20490325.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 10042 + ... + 11908.

Almost surely, 2^20490325 is an apocalyptic number.

20490325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20490325 is a deficient number, since it is larger than the sum of its proper divisors (4989195).

20490325 is a wasteful number, since it uses less digits than its factorization.

20490325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316 (or 2311 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20490325 is about 4526.6240179631. The cubic root of 20490325 is about 273.6421216127.

Adding to 20490325 its reverse (52309402), we get a palindrome (72799727).

The spelling of 20490325 in words is "twenty million, four hundred ninety thousand, three hundred twenty-five".