21341423444 has 12 divisors (see below), whose sum is σ = 40742717568. Its totient is φ = 9700647000.

The previous prime is 21341423407. The next prime is 21341423449. The reversal of 21341423444 is 44432414312.

It is a super-2 number, since 2×21341423444² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21341423444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341423449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242516132 + ... + 242516219.

It is an arithmetic number, because the mean of its divisors is an integer number (3395226464).

Almost surely, 2^21341423444 is an apocalyptic number.

It is an amenable number.

21341423444 is a deficient number, since it is larger than the sum of its proper divisors (19401294124).

21341423444 is a wasteful number, since it uses less digits than its factorization.

21341423444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485032366 (or 485032364 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

Adding to 21341423444 its reverse (44432414312), we get a palindrome (65773837756).

The spelling of 21341423444 in words is "twenty-one billion, three hundred forty-one million, four hundred twenty-three thousand, four hundred forty-four".