21042241435 has 8 divisors (see below), whose sum is σ = 25627566096. Its totient is φ = 16582542240.

The previous prime is 21042241427. The next prime is 21042241439. The reversal of 21042241435 is 53414224012.

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

It is not a de Polignac number, because 21042241435 - 2³ = 21042241427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21042241439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31405996 + ... + 31406665.

It is an arithmetic number, because the mean of its divisors is an integer number (3203445762).

Almost surely, 2^21042241435 is an apocalyptic number.

21042241435 is a deficient number, since it is larger than the sum of its proper divisors (4585324661).

21042241435 is an equidigital number, since it uses as much as digits as its factorization.

21042241435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62812733.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 21042241435 its reverse (53414224012), we get a palindrome (74456465447).

The spelling of 21042241435 in words is "twenty-one billion, forty-two million, two hundred forty-one thousand, four hundred thirty-five".