20404219 has 8 divisors (see below), whose sum is σ = 22323312. Its totient is φ = 18495840.

The previous prime is 20404213. The next prime is 20404249. The reversal of 20404219 is 91240402.

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

It is not a de Polignac number, because 20404219 - 2⁵ = 20404187 is a prime.

It is a super-2 number, since 2×20404219² = 832664305999922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20404219.

It is not an unprimeable number, because it can be changed into a prime (20404213) 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, 1617 + ... + 6589.

It is an arithmetic number, because the mean of its divisors is an integer number (2790414).

Almost surely, 2^20404219 is an apocalyptic number.

20404219 is a deficient number, since it is larger than the sum of its proper divisors (1919093).

20404219 is a wasteful number, since it uses less digits than its factorization.

20404219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20404219 is about 4517.1029432591. The cubic root of 20404219 is about 273.2582768667.

The spelling of 20404219 in words is "twenty million, four hundred four thousand, two hundred nineteen".