20519066 has 8 divisors (see below), whose sum is σ = 31840020. Its totient is φ = 9905728.

The previous prime is 20519063. The next prime is 20519077. The reversal of 20519066 is 66091502.

It can be written as a sum of positive squares in 2 ways, for example, as 20511841 + 7225 = 4529^2 + 85^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 176831 + ... + 176946.

Almost surely, 2^20519066 is an apocalyptic number.

20519066 is a deficient number, since it is larger than the sum of its proper divisors (11320954).

20519066 is a wasteful number, since it uses less digits than its factorization.

20519066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353808.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20519066 is about 4529.7975672209. The cubic root of 20519066 is about 273.7700043067.

The spelling of 20519066 in words is "twenty million, five hundred nineteen thousand, sixty-six".