21143240035 has 8 divisors (see below), whose sum is σ = 25571667456. Its totient is φ = 16781405760.

The previous prime is 21143240029. The next prime is 21143240087. The reversal of 21143240035 is 53004234112.

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

It is not a de Polignac number, because 21143240035 - 2²³ = 21134851427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21143239991 and 21143240009.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16647586 + ... + 16648855.

It is an arithmetic number, because the mean of its divisors is an integer number (3196458432).

Almost surely, 2^21143240035 is an apocalyptic number.

21143240035 is a deficient number, since it is larger than the sum of its proper divisors (4428427421).

21143240035 is a wasteful number, since it uses less digits than its factorization.

21143240035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33296573.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21143240035 its reverse (53004234112), we get a palindrome (74147474147).

The spelling of 21143240035 in words is "twenty-one billion, one hundred forty-three million, two hundred forty thousand, thirty-five".