20790519 has 4 divisors (see below), whose sum is σ = 27720696. Its totient is φ = 13860344.

The previous prime is 20790467. The next prime is 20790527. The reversal of 20790519 is 91509702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20790519 - 2⁷ = 20790391 is a prime.

It is a super-2 number, since 2×20790519² = 864491360578722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20790519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790589) 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 3 ways as a sum of consecutive naturals, for example, 3465084 + ... + 3465089.

It is an arithmetic number, because the mean of its divisors is an integer number (6930174).

Almost surely, 2^20790519 is an apocalyptic number.

20790519 is a deficient number, since it is larger than the sum of its proper divisors (6930177).

20790519 is an equidigital number, since it uses as much as digits as its factorization.

20790519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6930176.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 20790519 is about 4559.6621585376. The cubic root of 20790519 is about 274.9719817185.

The spelling of 20790519 in words is "twenty million, seven hundred ninety thousand, five hundred nineteen".