19802025 has 72 divisors (see below), whose sum is σ = 38997504. Its totient is φ = 9561600.

The previous prime is 19802023. The next prime is 19802033. The reversal of 19802025 is 52020891.

It is not a de Polignac number, because 19802025 - 2¹ = 19802023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19802025.

It is not an unprimeable number, because it can be changed into a prime (19802021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 118492 + ... + 118658.

It is an arithmetic number, because the mean of its divisors is an integer number (541632).

Almost surely, 2^19802025 is an apocalyptic number.

19802025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19802025 is a deficient number, since it is larger than the sum of its proper divisors (19195479).

19802025 is a wasteful number, since it uses less digits than its factorization.

19802025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 19802025 is about 4449.9466288934. The cubic root of 19802025 is about 270.5431453325.

It can be divided in two parts, 1980 and 2025, that added together give a triangular number (4005 = T₈₉).

The spelling of 19802025 in words is "nineteen million, eight hundred two thousand, twenty-five".