20825219 has 8 divisors (see below), whose sum is σ = 21636720. Its totient is φ = 20020000.

The previous prime is 20825209. The next prime is 20825227. The reversal of 20825219 is 91252802.

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

It is a cyclic number.

It is not a de Polignac number, because 20825219 - 2²⁰ = 19776643 is a prime.

It is a super-2 number, since 2×20825219² = 867379492795922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20825191 and 20825200.

It is not an unprimeable number, because it can be changed into a prime (20825209) 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, 5849 + ... + 8709.

It is an arithmetic number, because the mean of its divisors is an integer number (2704590).

Almost surely, 2^20825219 is an apocalyptic number.

20825219 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20825219 is a deficient number, since it is larger than the sum of its proper divisors (811501).

20825219 is a wasteful number, since it uses less digits than its factorization.

20825219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20825219 is about 4563.4656786263. The cubic root of 20825219 is about 275.1248755177.

The spelling of 20825219 in words is "twenty million, eight hundred twenty-five thousand, two hundred nineteen".