20450625 has 40 divisors (see below), whose sum is σ = 36738240. Its totient is φ = 10056000.

The previous prime is 20450623. The next prime is 20450659. The reversal of 20450625 is 52605402.

It is not a de Polignac number, because 20450625 - 2¹ = 20450623 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20450595 and 20450604.

It is not an unprimeable number, because it can be changed into a prime (20450623) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23956 + ... + 24794.

It is an arithmetic number, because the mean of its divisors is an integer number (918456).

Almost surely, 2^20450625 is an apocalyptic number.

20450625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20450625 is a deficient number, since it is larger than the sum of its proper divisors (16287615).

20450625 is an equidigital number, since it uses as much as digits as its factorization.

20450625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20450625 is about 4522.2367253385. The cubic root of 20450625 is about 273.4652801707.

The spelling of 20450625 in words is "twenty million, four hundred fifty thousand, six hundred twenty-five".