21140134332 has 12 divisors (see below), whose sum is σ = 49326980136. Its totient is φ = 7046711440.

The previous prime is 21140134307. The next prime is 21140134349. The reversal of 21140134332 is 23343104112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 880838919 + ... + 880838942.

It is an arithmetic number, because the mean of its divisors is an integer number (4110581678).

Almost surely, 2^21140134332 is an apocalyptic number.

It is an amenable number.

21140134332 is an abundant number, since it is smaller than the sum of its proper divisors (28186845804).

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

21140134332 is a wasteful number, since it uses less digits than its factorization.

21140134332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761677868 (or 1761677866 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21140134332 its reverse (23343104112), we get a palindrome (44483238444).

The spelling of 21140134332 in words is "twenty-one billion, one hundred forty million, one hundred thirty-four thousand, three hundred thirty-two".