20204519 has 2 divisors, whose sum is σ = 20204520. Its totient is φ = 20204518.

The previous prime is 20204477. The next prime is 20204533. The reversal of 20204519 is 91540202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20204519 is a prime.

It is a super-2 number, since 2×20204519² = 816445176042722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20204494 and 20204503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20204579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102259 + 10102260.

It is an arithmetic number, because the mean of its divisors is an integer number (10102260).

Almost surely, 2^20204519 is an apocalyptic number.

20204519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204519 is an equidigital number, since it uses as much as digits as its factorization.

20204519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20204519 is about 4494.9437148868. The cubic root of 20204519 is about 272.3638755632.

The spelling of 20204519 in words is "twenty million, two hundred four thousand, five hundred nineteen".