21442303213 has 8 divisors (see below), whose sum is σ = 21739390848. Its totient is φ = 21145306464.

The previous prime is 21442303189. The next prime is 21442303217. The reversal of 21442303213 is 31230324412.

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-21442303213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442303217) 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, 552306 + ... + 589852.

It is an arithmetic number, because the mean of its divisors is an integer number (2717423856).

Almost surely, 2^21442303213 is an apocalyptic number.

It is an amenable number.

21442303213 is a deficient number, since it is larger than the sum of its proper divisors (297087635).

21442303213 is an equidigital number, since it uses as much as digits as its factorization.

21442303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45443.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21442303213 its reverse (31230324412), we get a palindrome (52672627625).

The spelling of 21442303213 in words is "twenty-one billion, four hundred forty-two million, three hundred three thousand, two hundred thirteen".