19965025 has 12 divisors (see below), whose sum is σ = 25014892. Its totient is φ = 15805440.

The previous prime is 19965019. The next prime is 19965041. The reversal of 19965025 is 52056991.

It can be written as a sum of positive squares in 6 ways, for example, as 2122849 + 17842176 = 1457^2 + 4224^2 .

It is not a de Polignac number, because 19965025 - 2⁵ = 19964993 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1692 + ... + 6541.

Almost surely, 2^19965025 is an apocalyptic number.

It is an amenable number.

19965025 is a deficient number, since it is larger than the sum of its proper divisors (5049867).

19965025 is an equidigital number, since it uses as much as digits as its factorization.

19965025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8340 (or 8335 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 19965025 is about 4468.2239200828. The cubic root of 19965025 is about 271.2834414092.

It can be divided in two parts, 1996 and 5025, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 19965025 in words is "nineteen million, nine hundred sixty-five thousand, twenty-five".