20350625 has 10 divisors (see below), whose sum is σ = 25430922. Its totient is φ = 16280000.

The previous prime is 20350621. The next prime is 20350639. The reversal of 20350625 is 52605302.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 5202961 + 15147664 = 2281^2 + 3892^2 .

It is not a de Polignac number, because 20350625 - 2² = 20350621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20350625.

It is not an unprimeable number, because it can be changed into a prime (20350621) 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 9 ways as a sum of consecutive naturals, for example, 15656 + ... + 16905.

Almost surely, 2^20350625 is an apocalyptic number.

20350625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20350625 is a deficient number, since it is larger than the sum of its proper divisors (5080297).

20350625 is an frugal number, since it uses more digits than its factorization.

20350625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32581 (or 32566 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20350625 is about 4511.1667005332. The cubic root of 20350625 is about 273.0188191171.

Adding to 20350625 its reverse (52605302), we get a palindrome (72955927).

The spelling of 20350625 in words is "twenty million, three hundred fifty thousand, six hundred twenty-five".