21704115232 has 24 divisors (see below), whose sum is σ = 44587803456. Its totient is φ = 10380228672.

The previous prime is 21704115221. The next prime is 21704115241. The reversal of 21704115232 is 23251140712.

It is a self number, because there is not a number n which added to its sum of digits gives 21704115232.

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, 14743908 + ... + 14745379.

It is an arithmetic number, because the mean of its divisors is an integer number (1857825144).

Almost surely, 2^21704115232 is an apocalyptic number.

It is an amenable number.

21704115232 is an abundant number, since it is smaller than the sum of its proper divisors (22883688224).

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

21704115232 is a wasteful number, since it uses less digits than its factorization.

21704115232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29489320 (or 29489312 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 21704115232 its reverse (23251140712), we get a palindrome (44955255944).

The spelling of 21704115232 in words is "twenty-one billion, seven hundred four million, one hundred fifteen thousand, two hundred thirty-two".