19650525 has 12 divisors (see below), whose sum is σ = 32488992. Its totient is φ = 10480240.

The previous prime is 19650523. The next prime is 19650529. The reversal of 19650525 is 52505691.

It is not a de Polignac number, because 19650525 - 2¹ = 19650523 is a prime.

It is a super-2 number, since 2×19650525² = 772286265551250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19650523) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 130929 + ... + 131078.

It is an arithmetic number, because the mean of its divisors is an integer number (2707416).

Almost surely, 2^19650525 is an apocalyptic number.

19650525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19650525 is a deficient number, since it is larger than the sum of its proper divisors (12838467).

19650525 is a wasteful number, since it uses less digits than its factorization.

19650525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262020 (or 262015 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 19650525 is about 4432.8912686868. The cubic root of 19650525 is about 269.8514271762.

It can be divided in two parts, 196 and 50525, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 19650525 in words is "nineteen million, six hundred fifty thousand, five hundred twenty-five".