20449125 has 64 divisors (see below), whose sum is σ = 38787840. Its totient is φ = 10627200.

The previous prime is 20449109. The next prime is 20449127. The reversal of 20449125 is 52194402.

It is not a de Polignac number, because 20449125 - 2⁴ = 20449109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20449127) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 246334 + ... + 246416.

It is an arithmetic number, because the mean of its divisors is an integer number (606060).

Almost surely, 2^20449125 is an apocalyptic number.

20449125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20449125 is a deficient number, since it is larger than the sum of its proper divisors (18338715).

20449125 is an equidigital number, since it uses as much as digits as its factorization.

20449125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20449125 is about 4522.0708751633. The cubic root of 20449125 is about 273.4585940189.

The spelling of 20449125 in words is "twenty million, four hundred forty-nine thousand, one hundred twenty-five".