21113303334 has 16 divisors (see below), whose sum is σ = 42260430000. Its totient is φ = 7032130560.

The previous prime is 21113303333. The next prime is 21113303359. The reversal of 21113303334 is 43330331112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113303333) 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, 1401187 + ... + 1416174.

It is an arithmetic number, because the mean of its divisors is an integer number (2641276875).

Almost surely, 2^21113303334 is an apocalyptic number.

21113303334 is an abundant number, since it is smaller than the sum of its proper divisors (21147126666).

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

21113303334 is a wasteful number, since it uses less digits than its factorization.

21113303334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818615.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21113303334 its reverse (43330331112), we get a palindrome (64443634446).

The spelling of 21113303334 in words is "twenty-one billion, one hundred thirteen million, three hundred three thousand, three hundred thirty-four".