21342003213 has 16 divisors (see below), whose sum is σ = 29956792320. Its totient is φ = 13477763376.

The previous prime is 21342003191. The next prime is 21342003217. The reversal of 21342003213 is 31230024312.

It is not a de Polignac number, because 21342003213 - 2¹⁰ = 21342002189 is a prime.

It is a super-2 number, since 2×21342003213² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21342003213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342003217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1018306 + ... + 1039052.

It is an arithmetic number, because the mean of its divisors is an integer number (1872299520).

Almost surely, 2^21342003213 is an apocalyptic number.

It is an amenable number.

21342003213 is a deficient number, since it is larger than the sum of its proper divisors (8614789107).

21342003213 is a wasteful number, since it uses less digits than its factorization.

21342003213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38816.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21342003213 its reverse (31230024312), we get a palindrome (52572027525).

The spelling of 21342003213 in words is "twenty-one billion, three hundred forty-two million, three thousand, two hundred thirteen".