21042341435 has 8 divisors (see below), whose sum is σ = 25511127936. Its totient is φ = 16660327680.

The previous prime is 21042341429. The next prime is 21042341473. The reversal of 21042341435 is 53414324012.

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

It is not a de Polignac number, because 21042341435 - 2¹⁶ = 21042275899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21042341398 and 21042341407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21692651 + ... + 21693620.

It is an arithmetic number, because the mean of its divisors is an integer number (3188890992).

Almost surely, 2^21042341435 is an apocalyptic number.

21042341435 is a deficient number, since it is larger than the sum of its proper divisors (4468786501).

21042341435 is an equidigital number, since it uses as much as digits as its factorization.

21042341435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43386373.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21042341435 its reverse (53414324012), we get a palindrome (74456665447).

The spelling of 21042341435 in words is "twenty-one billion, forty-two million, three hundred forty-one thousand, four hundred thirty-five".