20481242 has 8 divisors (see below), whose sum is σ = 30928500. Its totient is φ = 10171744.

The previous prime is 20481217. The next prime is 20481257. The reversal of 20481242 is 24218402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19989841 + 491401 = 4471^2 + 701^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 34067 + ... + 34662.

Almost surely, 2^20481242 is an apocalyptic number.

20481242 is a deficient number, since it is larger than the sum of its proper divisors (10447258).

20481242 is a wasteful number, since it uses less digits than its factorization.

20481242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68880.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 20481242 is about 4525.6206204232. The cubic root of 20481242 is about 273.6016820599.

Adding to 20481242 its reverse (24218402), we get a palindrome (44699644).

The spelling of 20481242 in words is "twenty million, four hundred eighty-one thousand, two hundred forty-two".