20028219 has 8 divisors (see below), whose sum is σ = 26775552. Its totient is φ = 13316520.

The previous prime is 20028209. The next prime is 20028221. The reversal of 20028219 is 91282002.

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

It is not a de Polignac number, because 20028219 - 2¹³ = 20020027 is a prime.

It is a super-2 number, since 2×20028219² = 802259112623922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20028209) 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, 7567 + ... + 9864.

It is an arithmetic number, because the mean of its divisors is an integer number (3346944).

Almost surely, 2^20028219 is an apocalyptic number.

20028219 is a deficient number, since it is larger than the sum of its proper divisors (6747333).

20028219 is a wasteful number, since it uses less digits than its factorization.

20028219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17817.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20028219 is about 4475.2898230171. The cubic root of 20028219 is about 271.5693652487.

The spelling of 20028219 in words is "twenty million, twenty-eight thousand, two hundred nineteen".