20244642 has 32 divisors (see below), whose sum is σ = 44622144. Its totient is φ = 6072000.

The previous prime is 20244641. The next prime is 20244647. The reversal of 20244642 is 24644202.

It is not an unprimeable number, because it can be changed into a prime (20244641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5148 + ... + 8184.

It is an arithmetic number, because the mean of its divisors is an integer number (1394442).

Almost surely, 2^20244642 is an apocalyptic number.

20244642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20244642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22311072).

20244642 is an abundant number, since it is smaller than the sum of its proper divisors (24377502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20244642 is a wasteful number, since it uses less digits than its factorization.

20244642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 20244642 is about 4499.4046272813. The cubic root of 20244642 is about 272.5440469718.

Adding to 20244642 its reverse (24644202), we get a palindrome (44888844).

It can be divided in two parts, 2024 and 4642, that added together give a palindrome (6666).

The spelling of 20244642 in words is "twenty million, two hundred forty-four thousand, six hundred forty-two".