21434242001 has 8 divisors (see below), whose sum is σ = 21726902400. Its totient is φ = 21142115280.

The previous prime is 21434241923. The next prime is 21434242003. The reversal of 21434242001 is 10024243412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21434242001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21434242003) by changing a digit.

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, 52211 + ... + 213528.

It is an arithmetic number, because the mean of its divisors is an integer number (2715862800).

Almost surely, 2^21434242001 is an apocalyptic number.

It is an amenable number.

21434242001 is a deficient number, since it is larger than the sum of its proper divisors (292660399).

21434242001 is a wasteful number, since it uses less digits than its factorization.

21434242001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266839.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21434242001 its reverse (10024243412), we get a palindrome (31458485413).

The spelling of 21434242001 in words is "twenty-one billion, four hundred thirty-four million, two hundred forty-two thousand, one".