21443204401403 has 8 divisors (see below), whose sum is σ = 23299916497920. Its totient is φ = 19659304544040.

The previous prime is 21443204401319. The next prime is 21443204401457. The reversal of 21443204401403 is 30410440234412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21443204401403 - 2⁸ = 21443204401147 is a prime.

It is a super-2 number, since 2×21443204401403² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21443204401403.

It is not an unprimeable number, because it can be changed into a prime (21443204404403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18203059175 + ... + 18203060352.

It is an arithmetic number, because the mean of its divisors is an integer number (2912489562240).

Almost surely, 2^{21443204401403} is an apocalyptic number.

21443204401403 is a deficient number, since it is larger than the sum of its proper divisors (1856712096517).

21443204401403 is a wasteful number, since it uses less digits than its factorization.

21443204401403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36406119577.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21443204401403 its reverse (30410440234412), we get a palindrome (51853644635815).

The spelling of 21443204401403 in words is "twenty-one trillion, four hundred forty-three billion, two hundred four million, four hundred one thousand, four hundred three".