21113203330434 has 16 divisors (see below), whose sum is σ = 42227017725888. Its totient is φ = 7037632599312.

The previous prime is 21113203330421. The next prime is 21113203330459. The reversal of 21113203330434 is 43403330231112.

It is a Curzon number.

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, 25011262 + ... + 25841625.

It is an arithmetic number, because the mean of its divisors is an integer number (2639188607868).

Almost surely, 2^{21113203330434} is an apocalyptic number.

21113203330434 is an abundant number, since it is smaller than the sum of its proper divisors (21113814395454).

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

21113203330434 is a wasteful number, since it uses less digits than its factorization.

21113203330434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50922089.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 21113203330434 its reverse (43403330231112), we get a palindrome (64516533561546).

The spelling of 21113203330434 in words is "twenty-one trillion, one hundred thirteen billion, two hundred three million, three hundred thirty thousand, four hundred thirty-four".