20001219 has 8 divisors (see below), whose sum is σ = 30478080. Its totient is φ = 11429256.

The previous prime is 20001217. The next prime is 20001227. The reversal of 20001219 is 91210002.

It is a happy number.

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

It is not a de Polignac number, because 20001219 - 2¹ = 20001217 is a prime.

It is a super-2 number, since 2×20001219² = 800097522971922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20001198 and 20001207.

It is not an unprimeable number, because it can be changed into a prime (20001217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476199 + ... + 476240.

It is an arithmetic number, because the mean of its divisors is an integer number (3809760).

Almost surely, 2^20001219 is an apocalyptic number.

20001219 is a deficient number, since it is larger than the sum of its proper divisors (10476861).

20001219 is an equidigital number, since it uses as much as digits as its factorization.

20001219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952449.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 20001219 is about 4472.2722412662. The cubic root of 20001219 is about 271.4472763392.

The spelling of 20001219 in words is "twenty million, one thousand, two hundred nineteen".