20000021219 has 4 divisors (see below), whose sum is σ = 20004836544. Its totient is φ = 19995205896.

The previous prime is 20000021203. The next prime is 20000021221. The reversal of 20000021219 is 91212000002.

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

It is a cyclic number.

It is not a de Polignac number, because 20000021219 - 2⁴ = 20000021203 is a prime.

It is a super-2 number, since 2×20000021219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000021197 and 20000021206.

It is not an unprimeable number, because it can be changed into a prime (20000021269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2401427 + ... + 2409740.

It is an arithmetic number, because the mean of its divisors is an integer number (5001209136).

Almost surely, 2^20000021219 is an apocalyptic number.

20000021219 is a deficient number, since it is larger than the sum of its proper divisors (4815325).

20000021219 is an equidigital number, since it uses as much as digits as its factorization.

20000021219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815324.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20000021219 in words is "twenty billion, twenty-one thousand, two hundred nineteen".