20005925 has 6 divisors (see below), whose sum is σ = 24807378. Its totient is φ = 16004720.

The previous prime is 20005919. The next prime is 20005949. The reversal of 20005925 is 52950002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 917764 + 19088161 = 958^2 + 4369^2 .

It is not a de Polignac number, because 20005925 - 2⁶ = 20005861 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 20005925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 400094 + ... + 400143.

It is an arithmetic number, because the mean of its divisors is an integer number (4134563).

Almost surely, 2^20005925 is an apocalyptic number.

20005925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20005925 is a deficient number, since it is larger than the sum of its proper divisors (4801453).

20005925 is an equidigital number, since it uses as much as digits as its factorization.

20005925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800247 (or 800242 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 20005925 is about 4472.7983410836. The cubic root of 20005925 is about 271.4685638869.

Adding to 20005925 its reverse (52950002), we get a palindrome (72955927).

The spelling of 20005925 in words is "twenty million, five thousand, nine hundred twenty-five".