20215441 has 8 divisors (see below), whose sum is σ = 21181184. Its totient is φ = 19269360.

The previous prime is 20215417. The next prime is 20215451. The reversal of 20215441 is 14451202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20215441 is a prime.

It is a super-3 number, since 3×20215441³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20215451) 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, 2790 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (2647648).

Almost surely, 2^20215441 is an apocalyptic number.

It is an amenable number.

20215441 is a deficient number, since it is larger than the sum of its proper divisors (965743).

20215441 is an equidigital number, since it uses as much as digits as its factorization.

20215441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9831.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20215441 is about 4496.1584714065. The cubic root of 20215441 is about 272.4129441632.

Adding to 20215441 its reverse (14451202), we get a palindrome (34666643).

The spelling of 20215441 in words is "twenty million, two hundred fifteen thousand, four hundred forty-one".