19993025 has 24 divisors (see below), whose sum is σ = 26914944. Its totient is φ = 14644800.

The previous prime is 19993013. The next prime is 19993087. The reversal of 19993025 is 52039991.

It is not a de Polignac number, because 19993025 - 2¹⁰ = 19992001 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 19993025.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73640 + ... + 73910.

It is an arithmetic number, because the mean of its divisors is an integer number (1121456).

Almost surely, 2^19993025 is an apocalyptic number.

It is an amenable number.

19993025 is a deficient number, since it is larger than the sum of its proper divisors (6921919).

19993025 is a wasteful number, since it uses less digits than its factorization.

19993025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 19993025 is about 4471.3560582893. The cubic root of 19993025 is about 271.4102028857.

The spelling of 19993025 in words is "nineteen million, nine hundred ninety-three thousand, twenty-five".