21343054632 has 64 divisors (see below), whose sum is σ = 54398018880. Its totient is φ = 6975800832.

The previous prime is 21343054547. The next prime is 21343054661. The reversal of 21343054632 is 23645034312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21343054593 and 21343054602.

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, 2543628 + ... + 2552004.

It is an arithmetic number, because the mean of its divisors is an integer number (849969045).

Almost surely, 2^21343054632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21343054632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27199009440).

21343054632 is an abundant number, since it is smaller than the sum of its proper divisors (33054964248).

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

21343054632 is a wasteful number, since it uses less digits than its factorization.

21343054632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10442 (or 10438 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 21343054632 its reverse (23645034312), we get a palindrome (44988088944).

The spelling of 21343054632 in words is "twenty-one billion, three hundred forty-three million, fifty-four thousand, six hundred thirty-two".