19528965 has 16 divisors (see below), whose sum is σ = 34718400. Its totient is φ = 10415376.

The previous prime is 19528931. The next prime is 19528991. The reversal of 19528965 is 56982591.

It is not a de Polignac number, because 19528965 - 2⁸ = 19528709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 19528965.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 72195 + ... + 72464.

It is an arithmetic number, because the mean of its divisors is an integer number (2169900).

Almost surely, 2^19528965 is an apocalyptic number.

19528965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19528965 is a deficient number, since it is larger than the sum of its proper divisors (15189435).

19528965 is a wasteful number, since it uses less digits than its factorization.

19528965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144673 (or 144667 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 19528965 is about 4419.1588566151. The cubic root of 19528965 is about 269.2938336934.

The spelling of 19528965 in words is "nineteen million, five hundred twenty-eight thousand, nine hundred sixty-five".