20519065 has 32 divisors (see below), whose sum is σ = 29352960. Its totient is φ = 13478400.

The previous prime is 20519063. The next prime is 20519077. The reversal of 20519065 is 56091502.

It is not a de Polignac number, because 20519065 - 2¹ = 20519063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20519063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113275 + ... + 113455.

It is an arithmetic number, because the mean of its divisors is an integer number (917280).

Almost surely, 2^20519065 is an apocalyptic number.

It is an amenable number.

20519065 is a deficient number, since it is larger than the sum of its proper divisors (8833895).

20519065 is a wasteful number, since it uses less digits than its factorization.

20519065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 20519065 is about 4529.7974568406. The cubic root of 20519065 is about 273.7699998593.

The spelling of 20519065 in words is "twenty million, five hundred nineteen thousand, sixty-five".