19925 has 6 divisors (see below), whose sum is σ = 24738. Its totient is φ = 15920.

The previous prime is 19919. The next prime is 19927. The reversal of 19925 is 52991.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1156 + 18769 = 34^2 + 137^2 .

It is not a de Polignac number, because 19925 - 2⁶ = 19861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19894 and 19903.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 19925.

It is not an unprimeable number, because it can be changed into a prime (19927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374 + ... + 423.

It is an arithmetic number, because the mean of its divisors is an integer number (4123).

2¹⁹⁹²⁵ is an apocalyptic number.

It is an amenable number.

19925 is a deficient number, since it is larger than the sum of its proper divisors (4813).

19925 is an equidigital number, since it uses as much as digits as its factorization.

19925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 802 counting only the distinct ones).

The product of its digits is 810, while the sum is 26.

The square root of 19925 is about 141.1559421349. The cubic root of 19925 is about 27.1102034444.

The spelling of 19925 in words is "nineteen thousand, nine hundred twenty-five".