21604632215470 has 8 divisors (see below), whose sum is σ = 38888337987864. Its totient is φ = 8641852886184.

The previous prime is 21604632215461. The next prime is 21604632215471. The reversal of 21604632215470 is 7451223640612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21604632215471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080231610764 + ... + 1080231610783.

It is an arithmetic number, because the mean of its divisors is an integer number (4861042248483).

Almost surely, 2^{21604632215470} is an apocalyptic number.

21604632215470 is a deficient number, since it is larger than the sum of its proper divisors (17283705772394).

21604632215470 is a wasteful number, since it uses less digits than its factorization.

21604632215470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160463221554.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 21604632215470 in words is "twenty-one trillion, six hundred four billion, six hundred thirty-two million, two hundred fifteen thousand, four hundred seventy".