21342004244 has 48 divisors (see below), whose sum is σ = 42561832320. Its totient is φ = 9268976640.

The previous prime is 21342004241. The next prime is 21342004309. The reversal of 21342004244 is 44240024312.

It is a happy number.

It is a super-2 number, since 2×21342004244² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342004241) 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, 953372 + ... + 975500.

It is an arithmetic number, because the mean of its divisors is an integer number (886704840).

Almost surely, 2^21342004244 is an apocalyptic number.

It is an amenable number.

21342004244 is a deficient number, since it is larger than the sum of its proper divisors (21219828076).

21342004244 is a wasteful number, since it uses less digits than its factorization.

21342004244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23120 (or 23118 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21342004244 its reverse (44240024312), we get a palindrome (65582028556).

The spelling of 21342004244 in words is "twenty-one billion, three hundred forty-two million, four thousand, two hundred forty-four".