20698219 has 2 divisors, whose sum is σ = 20698220. Its totient is φ = 20698218.

The previous prime is 20698217. The next prime is 20698241. The reversal of 20698219 is 91289602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20698219 - 2¹ = 20698217 is a prime.

It is a super-2 number, since 2×20698219² = 856832539543922, which contains 22 as substring.

Together with 20698217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20698211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349109 + 10349110.

It is an arithmetic number, because the mean of its divisors is an integer number (10349110).

Almost surely, 2^20698219 is an apocalyptic number.

20698219 is a deficient number, since it is larger than the sum of its proper divisors (1).

20698219 is an equidigital number, since it uses as much as digits as its factorization.

20698219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 20698219 is about 4549.5295361169. The cubic root of 20698219 is about 274.5644631910.

The spelling of 20698219 in words is "twenty million, six hundred ninety-eight thousand, two hundred nineteen".