20040925 has 12 divisors (see below), whose sum is σ = 25099956. Its totient is φ = 15872000.

The previous prime is 20040919. The next prime is 20040929. The reversal of 20040925 is 52904002.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4588164 + 15452761 = 2142^2 + 3931^2 .

It is not a de Polignac number, because 20040925 - 2¹¹ = 20038877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20040896 and 20040905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1444 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (2091663).

Almost surely, 2^20040925 is an apocalyptic number.

20040925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20040925 is a deficient number, since it is larger than the sum of its proper divisors (5059031).

20040925 is a wasteful number, since it uses less digits than its factorization.

20040925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8048 (or 8043 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20040925 is about 4476.7091708084. The cubic root of 20040925 is about 271.6267814195.

Adding to 20040925 its reverse (52904002), we get a palindrome (72944927).

The spelling of 20040925 in words is "twenty million, forty thousand, nine hundred twenty-five".