20205419 has 8 divisors (see below), whose sum is σ = 21796992. Its totient is φ = 18619200.

The previous prime is 20205389. The next prime is 20205467. The reversal of 20205419 is 91450202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20205419 is a prime.

It is a super-2 number, since 2×20205419² = 816517913931122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20205394 and 20205403.

It is not an unprimeable number, because it can be changed into a prime (20202419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10319 + ... + 12119.

It is an arithmetic number, because the mean of its divisors is an integer number (2724624).

Almost surely, 2^20205419 is an apocalyptic number.

20205419 is a deficient number, since it is larger than the sum of its proper divisors (1591573).

20205419 is a wasteful number, since it uses less digits than its factorization.

20205419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677.

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

The square root of 20205419 is about 4495.0438262602. The cubic root of 20205419 is about 272.3679196064.

The spelling of 20205419 in words is "twenty million, two hundred five thousand, four hundred nineteen".