21730352398 has 8 divisors (see below), whose sum is σ = 32699668608. Its totient is φ = 10830462864.

The previous prime is 21730352387. The next prime is 21730352411. The reversal of 21730352398 is 89325303712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17355886 + ... + 17357137.

It is an arithmetic number, because the mean of its divisors is an integer number (4087458576).

Almost surely, 2^21730352398 is an apocalyptic number.

21730352398 is a deficient number, since it is larger than the sum of its proper divisors (10969316210).

21730352398 is a wasteful number, since it uses less digits than its factorization.

21730352398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34713338.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 21730352398 in words is "twenty-one billion, seven hundred thirty million, three hundred fifty-two thousand, three hundred ninety-eight".