21115325334 has 32 divisors (see below), whose sum is σ = 42392173824. Its totient is φ = 7011574560.

The previous prime is 21115325291. The next prime is 21115325339. The reversal of 21115325334 is 43352351112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115325339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1717152 + ... + 1729404.

It is an arithmetic number, because the mean of its divisors is an integer number (1324755432).

Almost surely, 2^21115325334 is an apocalyptic number.

21115325334 is an abundant number, since it is smaller than the sum of its proper divisors (21276848490).

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

21115325334 is a wasteful number, since it uses less digits than its factorization.

21115325334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13332.

The product of its digits is 10800, while the sum is 30.

Adding to 21115325334 its reverse (43352351112), we get a palindrome (64467676446).

The spelling of 21115325334 in words is "twenty-one billion, one hundred fifteen million, three hundred twenty-five thousand, three hundred thirty-four".