21423303122444 has 24 divisors (see below), whose sum is σ = 38292829917888. Its totient is φ = 10482546637440.

The previous prime is 21423303122407. The next prime is 21423303122461. The reversal of 21423303122444 is 44422130332412.

It is a happy number.

It is a super-2 number, since 2×21423303122444² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4856399 + ... + 8150534.

It is an arithmetic number, because the mean of its divisors is an integer number (1595534579912).

Almost surely, 2^{21423303122444} is an apocalyptic number.

It is an amenable number.

21423303122444 is a deficient number, since it is larger than the sum of its proper divisors (16869526795444).

21423303122444 is a wasteful number, since it uses less digits than its factorization.

21423303122444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13015745 (or 13015743 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 21423303122444 its reverse (44422130332412), we get a palindrome (65845433454856).

The spelling of 21423303122444 in words is "twenty-one trillion, four hundred twenty-three billion, three hundred three million, one hundred twenty-two thousand, four hundred forty-four".