20090519 has 4 divisors (see below), whose sum is σ = 20633544. Its totient is φ = 19547496.

The previous prime is 20090491. The next prime is 20090527. The reversal of 20090519 is 91509002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20090519 is a prime.

It is a super-2 number, since 2×20090519² = 807257907378722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20090599) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 271457 + ... + 271530.

It is an arithmetic number, because the mean of its divisors is an integer number (5158386).

Almost surely, 2^20090519 is an apocalyptic number.

20090519 is a deficient number, since it is larger than the sum of its proper divisors (543025).

20090519 is an equidigital number, since it uses as much as digits as its factorization.

20090519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543024.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 20090519 is about 4482.2448616737. The cubic root of 20090519 is about 271.8506560138.

The spelling of 20090519 in words is "twenty million, ninety thousand, five hundred nineteen".