20441451 has 4 divisors (see below), whose sum is σ = 27255272. Its totient is φ = 13627632.

The previous prime is 20441437. The next prime is 20441461. The reversal of 20441451 is 15414402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20441451 - 2⁵ = 20441419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20441401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406906 + ... + 3406911.

It is an arithmetic number, because the mean of its divisors is an integer number (6813818).

Almost surely, 2^20441451 is an apocalyptic number.

20441451 is a deficient number, since it is larger than the sum of its proper divisors (6813821).

20441451 is an equidigital number, since it uses as much as digits as its factorization.

20441451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813820.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20441451 is about 4521.2222904874. Note that the first 4 decimals coincide. The cubic root of 20441451 is about 273.4243825501.

Adding to 20441451 its reverse (15414402), we get a palindrome (35855853).

The spelling of 20441451 in words is "twenty million, four hundred forty-one thousand, four hundred fifty-one".