21843234230738 has 6 divisors (see below), whose sum is σ = 32764861260471. Its totient is φ = 10921613810582.

The previous prime is 21843234230683. The next prime is 21843234230747. The reversal of 21843234230738 is 83703243234812.

It can be written as a sum of positive squares in only one way, i.e., 10921617115369 + 10921617115369 = 3304787^2 + 3304787^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3304787.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4957181 + ... + 8261967.

Almost surely, 2^{21843234230738} is an apocalyptic number.

21843234230738 is a deficient number, since it is larger than the sum of its proper divisors (10921627029733).

21843234230738 is an frugal number, since it uses more digits than its factorization.

21843234230738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6609576 (or 3304789 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 50.

The spelling of 21843234230738 in words is "twenty-one trillion, eight hundred forty-three billion, two hundred thirty-four million, two hundred thirty thousand, seven hundred thirty-eight".