21443540321010 has 16 divisors (see below), whose sum is σ = 51464496770496. Its totient is φ = 5718277418928.

The previous prime is 21443540321003. The next prime is 21443540321011. The reversal of 21443540321010 is 1012304534412.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 714784677367 = 21443540321010 / (2 + 1 + 4 + 4 + 3 + 5 + 4 + 0 + 3 + 2 + 1 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (21443540321011) 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, 357392338654 + ... + 357392338713.

It is an arithmetic number, because the mean of its divisors is an integer number (3216531048156).

Almost surely, 2^{21443540321010} is an apocalyptic number.

21443540321010 is an abundant number, since it is smaller than the sum of its proper divisors (30020956449486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21443540321010 is a wasteful number, since it uses less digits than its factorization.

21443540321010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714784677377.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 21443540321010 its reverse (1012304534412), we get a palindrome (22455844855422).

The spelling of 21443540321010 in words is "twenty-one trillion, four hundred forty-three billion, five hundred forty million, three hundred twenty-one thousand, ten".