21443103304426 has 16 divisors (see below), whose sum is σ = 32583153764448. Its totient is φ = 10582297866000.

The previous prime is 21443103304391. The next prime is 21443103304463. The reversal of 21443103304426 is 62440330134412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61279065 + ... + 61627996.

It is an arithmetic number, because the mean of its divisors is an integer number (2036447110278).

Almost surely, 2^{21443103304426} is an apocalyptic number.

21443103304426 is a deficient number, since it is larger than the sum of its proper divisors (11140050460022).

21443103304426 is a wasteful number, since it uses less digits than its factorization.

21443103304426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122908197.

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 21443103304426 its reverse (62440330134412), we get a palindrome (83883433438838).

The spelling of 21443103304426 in words is "twenty-one trillion, four hundred forty-three billion, one hundred three million, three hundred four thousand, four hundred twenty-six".