21443511342197 has 64 divisors (see below), whose sum is σ = 26440128000000. Its totient is φ = 17357807839680.

The previous prime is 21443511342167. The next prime is 21443511342251. The reversal of 21443511342197 is 79124311534412.

It is not a de Polignac number, because 21443511342197 - 2¹⁴ = 21443511325813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443511342167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 116695922 + ... + 116879532.

It is an arithmetic number, because the mean of its divisors is an integer number (413127000000).

Almost surely, 2^{21443511342197} is an apocalyptic number.

It is an amenable number.

21443511342197 is a deficient number, since it is larger than the sum of its proper divisors (4996616657803).

21443511342197 is a wasteful number, since it uses less digits than its factorization.

21443511342197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183919 (or 183905 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 21443511342197 in words is "twenty-one trillion, four hundred forty-three billion, five hundred eleven million, three hundred forty-two thousand, one hundred ninety-seven".