21443323011304 has 8 divisors (see below), whose sum is σ = 40206230646210. Its totient is φ = 10721661505648.

The previous prime is 21443323011283. The next prime is 21443323011323. The reversal of 21443323011304 is 40311032334412.

It can be written as a sum of positive squares in only one way, i.e., 21157258488804 + 286064522500 = 4599702^2 + 534850^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21443323011304² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340207688199 + ... + 1340207688214.

Almost surely, 2^{21443323011304} is an apocalyptic number.

It is an amenable number.

21443323011304 is a deficient number, since it is larger than the sum of its proper divisors (18762907634906).

21443323011304 is a wasteful number, since it uses less digits than its factorization.

21443323011304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680415376419 (or 2680415376415 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21443323011304 its reverse (40311032334412), we get a palindrome (61754355345716).

The spelling of 21443323011304 in words is "twenty-one trillion, four hundred forty-three billion, three hundred twenty-three million, eleven thousand, three hundred four".