21433413124344 has 128 divisors (see below), whose sum is σ = 59050767283200. Its totient is φ = 6441151449600.

The previous prime is 21433413124339. The next prime is 21433413124349. The reversal of 21433413124344 is 44342131433412.

It is an interprime number because it is at equal distance from previous prime (21433413124339) and next prime (21433413124349).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433413124349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304628769 + ... + 304699119.

It is an arithmetic number, because the mean of its divisors is an integer number (461334119400).

Almost surely, 2^{21433413124344} is an apocalyptic number.

21433413124344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21433413124344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29525383641600).

21433413124344 is an abundant number, since it is smaller than the sum of its proper divisors (37617354158856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21433413124344 is a wasteful number, since it uses less digits than its factorization.

21433413124344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93125 (or 93121 counting only the distinct ones).

The product of its digits is 331776, while the sum is 39.

Adding to 21433413124344 its reverse (44342131433412), we get a palindrome (65775544557756).

The spelling of 21433413124344 in words is "twenty-one trillion, four hundred thirty-three billion, four hundred thirteen million, one hundred twenty-four thousand, three hundred forty-four".