21443030303431 has 16 divisors (see below), whose sum is σ = 23537910592800. Its totient is φ = 19372763776000.

The previous prime is 21443030303407. The next prime is 21443030303437. The reversal of 21443030303431 is 13430303034412.

It is a cyclic number.

It is not a de Polignac number, because 21443030303431 - 2¹⁵ = 21443030270663 is a prime.

It is a super-2 number, since 2×21443030303431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21443030303393 and 21443030303402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443030303437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7849246 + ... + 10222363.

It is an arithmetic number, because the mean of its divisors is an integer number (1471119412050).

Almost surely, 2^{21443030303431} is an apocalyptic number.

21443030303431 is a deficient number, since it is larger than the sum of its proper divisors (2094880289369).

21443030303431 is a wasteful number, since it uses less digits than its factorization.

21443030303431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18072290.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 21443030303431 its reverse (13430303034412), we get a palindrome (34873333337843).

The spelling of 21443030303431 in words is "twenty-one trillion, four hundred forty-three billion, thirty million, three hundred three thousand, four hundred thirty-one".