21035302134 has 128 divisors (see below), whose sum is σ = 54393569280. Its totient is φ = 5262364800.

The previous prime is 21035302117. The next prime is 21035302153. The reversal of 21035302134 is 43120353012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6201579 + ... + 6204969.

It is an arithmetic number, because the mean of its divisors is an integer number (424949760).

Almost surely, 2^21035302134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21035302134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27196784640).

21035302134 is an abundant number, since it is smaller than the sum of its proper divisors (33358267146).

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

21035302134 is a wasteful number, since it uses less digits than its factorization.

21035302134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 21035302134 its reverse (43120353012), we get a palindrome (64155655146).

The spelling of 21035302134 in words is "twenty-one billion, thirty-five million, three hundred two thousand, one hundred thirty-four".