19840925 has 24 divisors (see below), whose sum is σ = 27159720. Its totient is φ = 14284800.

The previous prime is 19840913. The next prime is 19840937. The reversal of 19840925 is 52904891.

It is an interprime number because it is at equal distance from previous prime (19840913) and next prime (19840937).

It can be written as a sum of positive squares in 12 ways, for example, as 16736281 + 3104644 = 4091^2 + 1762^2 .

It is not a de Polignac number, because 19840925 - 2¹⁶ = 19775389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12581 + ... + 14069.

It is an arithmetic number, because the mean of its divisors is an integer number (1131655).

Almost surely, 2^19840925 is an apocalyptic number.

It is an amenable number.

19840925 is a deficient number, since it is larger than the sum of its proper divisors (7318795).

19840925 is a wasteful number, since it uses less digits than its factorization.

19840925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1548 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 19840925 is about 4454.3153233690. The cubic root of 19840925 is about 270.7201852145.

The spelling of 19840925 in words is "nineteen million, eight hundred forty thousand, nine hundred twenty-five".