21604523264246 has 8 divisors (see below), whose sum is σ = 34899614503824. Its totient is φ = 9971318429640.

The previous prime is 21604523264231. The next prime is 21604523264279. The reversal of 21604523264246 is 64246232540612.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21604523264246.

It is a congruent number.

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, 415471601210 + ... + 415471601261.

It is an arithmetic number, because the mean of its divisors is an integer number (4362451812978).

Almost surely, 2^{21604523264246} is an apocalyptic number.

21604523264246 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21604523264246 is a deficient number, since it is larger than the sum of its proper divisors (13295091239578).

21604523264246 is a wasteful number, since it uses less digits than its factorization.

21604523264246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830943202486.

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 21604523264246 in words is "twenty-one trillion, six hundred four billion, five hundred twenty-three million, two hundred sixty-four thousand, two hundred forty-six".