20533441 has 4 divisors (see below), whose sum is σ = 20618884. Its totient is φ = 20448000.

The previous prime is 20533427. The next prime is 20533451. The reversal of 20533441 is 14433502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14137600 + 6395841 = 3760^2 + 2529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20533441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20533451) 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, 42360 + ... + 42841.

It is an arithmetic number, because the mean of its divisors is an integer number (5154721).

Almost surely, 2^20533441 is an apocalyptic number.

It is an amenable number.

20533441 is a deficient number, since it is larger than the sum of its proper divisors (85443).

20533441 is an equidigital number, since it uses as much as digits as its factorization.

20533441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85442.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20533441 is about 4531.3840049151. The cubic root of 20533441 is about 273.8339208800.

Adding to 20533441 its reverse (14433502), we get a palindrome (34966943).

The spelling of 20533441 in words is "twenty million, five hundred thirty-three thousand, four hundred forty-one".