21443154511344 has 40 divisors (see below), whose sum is σ = 55402790601600. Its totient is φ = 7146689166528.

The previous prime is 21443154511319. The next prime is 21443154511423. The reversal of 21443154511344 is 44311545134412.

It is a junction number, because it is equal to n+sod(n) for n = 21443154511296 and 21443154511305.

It is a congruent number.

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, 31819444 + ... + 32486355.

It is an arithmetic number, because the mean of its divisors is an integer number (1385069765040).

Almost surely, 2^{21443154511344} is an apocalyptic number.

21443154511344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21443154511344 is an abundant number, since it is smaller than the sum of its proper divisors (33959636090256).

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

21443154511344 is a wasteful number, since it uses less digits than its factorization.

21443154511344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64312757 (or 64312751 counting only the distinct ones).

The product of its digits is 460800, while the sum is 42.

Adding to 21443154511344 its reverse (44311545134412), we get a palindrome (65754699645756).

The spelling of 21443154511344 in words is "twenty-one trillion, four hundred forty-three billion, one hundred fifty-four million, five hundred eleven thousand, three hundred forty-four".