21604025076747 has 8 divisors (see below), whose sum is σ = 28805393119440. Its totient is φ = 14402670209280.

The previous prime is 21604025076731. The next prime is 21604025076749. The reversal of 21604025076747 is 74767052040612.

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

It is not a de Polignac number, because 21604025076747 - 2⁴ = 21604025076731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21604025076747.

It is not an unprimeable number, because it can be changed into a prime (21604025076749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1549779 + ... + 6753507.

It is an arithmetic number, because the mean of its divisors is an integer number (3600674139930).

Almost surely, 2^{21604025076747} is an apocalyptic number.

21604025076747 is a deficient number, since it is larger than the sum of its proper divisors (7201368042693).

21604025076747 is a wasteful number, since it uses less digits than its factorization.

21604025076747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6587613.

The product of its (nonzero) digits is 3951360, while the sum is 51.

The spelling of 21604025076747 in words is "twenty-one trillion, six hundred four billion, twenty-five million, seventy-six thousand, seven hundred forty-seven".