21604635006046 has 8 divisors (see below), whose sum is σ = 32407186124880. Its totient is φ = 10802239631088.

The previous prime is 21604635006041. The next prime is 21604635006091. The reversal of 21604635006046 is 64060053640612.

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

It is a junction number, because it is equal to n+sod(n) for n = 21604635005993 and 21604635006011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21604635006041) 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, 38588551 + ... + 39144418.

It is an arithmetic number, because the mean of its divisors is an integer number (4050898265610).

Almost surely, 2^{21604635006046} is an apocalyptic number.

21604635006046 is a deficient number, since it is larger than the sum of its proper divisors (10802551118834).

21604635006046 is a wasteful number, since it uses less digits than its factorization.

21604635006046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77871938.

The product of its (nonzero) digits is 622080, while the sum is 43.

Adding to 21604635006046 its reverse (64060053640612), we get a palindrome (85664688646658).

The spelling of 21604635006046 in words is "twenty-one trillion, six hundred four billion, six hundred thirty-five million, six thousand, forty-six".