21135064332 has 48 divisors (see below), whose sum is σ = 50499088640. Its totient is φ = 6876128448.

The previous prime is 21135064319. The next prime is 21135064361. The reversal of 21135064332 is 23346053112.

It is a self number, because there is not a number n which added to its sum of digits gives 21135064332.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 723033 + ... + 751695.

Almost surely, 2^21135064332 is an apocalyptic number.

It is an amenable number.

21135064332 is an abundant number, since it is smaller than the sum of its proper divisors (29364024308).

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

21135064332 is a wasteful number, since it uses less digits than its factorization.

21135064332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30142 (or 30140 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The spelling of 21135064332 in words is "twenty-one billion, one hundred thirty-five million, sixty-four thousand, three hundred thirty-two".