21734328688 has 10 divisors (see below), whose sum is σ = 42110261864. Its totient is φ = 10867164336.

The previous prime is 21734328683. The next prime is 21734328697. The reversal of 21734328688 is 88682343712.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21734328683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 679197756 + ... + 679197787.

Almost surely, 2^21734328688 is an apocalyptic number.

It is an amenable number.

21734328688 is a deficient number, since it is larger than the sum of its proper divisors (20375933176).

21734328688 is a wasteful number, since it uses less digits than its factorization.

21734328688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358395551 (or 1358395545 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 52.

The spelling of 21734328688 in words is "twenty-one billion, seven hundred thirty-four million, three hundred twenty-eight thousand, six hundred eighty-eight".