21443704754753 has 4 divisors (see below), whose sum is σ = 21444610990848. Its totient is φ = 21442798518660.

The previous prime is 21443704754743. The next prime is 21443704754767. The reversal of 21443704754753 is 35745740734412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21443704754753 - 2¹⁴ = 21443704738369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21443704754743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453082553 + ... + 453129878.

It is an arithmetic number, because the mean of its divisors is an integer number (5361152747712).

Almost surely, 2^{21443704754753} is an apocalyptic number.

It is an amenable number.

21443704754753 is a deficient number, since it is larger than the sum of its proper divisors (906236095).

21443704754753 is an equidigital number, since it uses as much as digits as its factorization.

21443704754753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906236094.

The product of its (nonzero) digits is 39513600, while the sum is 56.

The spelling of 21443704754753 in words is "twenty-one trillion, four hundred forty-three billion, seven hundred four million, seven hundred fifty-four thousand, seven hundred fifty-three".