20998219 has 6 divisors (see below), whose sum is σ = 23080820. Its totient is φ = 19089180.

The previous prime is 20998189. The next prime is 20998223. The reversal of 20998219 is 91289902.

It is not a de Polignac number, because 20998219 - 2¹⁹ = 20473931 is a prime.

It is a super-2 number, since 2×20998219² = 881850402343922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20998259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86649 + ... + 86890.

Almost surely, 2^20998219 is an apocalyptic number.

20998219 is a deficient number, since it is larger than the sum of its proper divisors (2082601).

20998219 is a wasteful number, since it uses less digits than its factorization.

20998219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173561 (or 173550 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 20998219 is about 4582.3813678043. The cubic root of 20998219 is about 275.8846179828.

The spelling of 20998219 in words is "twenty million, nine hundred ninety-eight thousand, two hundred nineteen".