21003453050443 has 16 divisors (see below), whose sum is σ = 21248485082496. Its totient is φ = 20759020369920.

The previous prime is 21003453050441. The next prime is 21003453050449. The reversal of 21003453050443 is 34405035430012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21003453050443 - 2¹ = 21003453050441 is a prime.

It is a super-2 number, since 2×21003453050443² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21003453050399 and 21003453050408.

It is not an unprimeable number, because it can be changed into a prime (21003453050441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236286655 + ... + 236375527.

It is an arithmetic number, because the mean of its divisors is an integer number (1328030317656).

Almost surely, 2^{21003453050443} is an apocalyptic number.

21003453050443 is a deficient number, since it is larger than the sum of its proper divisors (245032032053).

21003453050443 is a wasteful number, since it uses less digits than its factorization.

21003453050443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92214.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 21003453050443 its reverse (34405035430012), we get a palindrome (55408488480455).

The spelling of 21003453050443 in words is "twenty-one trillion, three billion, four hundred fifty-three million, fifty thousand, four hundred forty-three".