20244355 has 4 divisors (see below), whose sum is σ = 24293232. Its totient is φ = 16195480.

The previous prime is 20244337. The next prime is 20244361. The reversal of 20244355 is 55344202.

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

It is not a de Polignac number, because 20244355 - 2⁹ = 20243843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2024431 + ... + 2024440.

It is an arithmetic number, because the mean of its divisors is an integer number (6073308).

Almost surely, 2^20244355 is an apocalyptic number.

20244355 is a deficient number, since it is larger than the sum of its proper divisors (4048877).

20244355 is an equidigital number, since it uses as much as digits as its factorization.

20244355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048876.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 20244355 is about 4499.3727340597. The cubic root of 20244355 is about 272.5427590506.

Adding to 20244355 its reverse (55344202), we get a palindrome (75588557).

The spelling of 20244355 in words is "twenty million, two hundred forty-four thousand, three hundred fifty-five".