21113433242434 has 8 divisors (see below), whose sum is σ = 34106315237820. Its totient is φ = 9744661496496.

The previous prime is 21113433242381. The next prime is 21113433242443. The reversal of 21113433242434 is 43424233431112.

It can be written as a sum of positive squares in 2 ways, for example, as 21072258745209 + 41174497225 = 4590453^2 + 202915^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21113433242393 and 21113433242402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406027562329 + ... + 406027562380.

Almost surely, 2^{21113433242434} is an apocalyptic number.

21113433242434 is a deficient number, since it is larger than the sum of its proper divisors (12992881995386).

21113433242434 is a wasteful number, since it uses less digits than its factorization.

21113433242434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812055124724.

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

Adding to 21113433242434 its reverse (43424233431112), we get a palindrome (64537666673546).

The spelling of 21113433242434 in words is "twenty-one trillion, one hundred thirteen billion, four hundred thirty-three million, two hundred forty-two thousand, four hundred thirty-four".