21604072667045 has 8 divisors (see below), whose sum is σ = 28281695127840. Its totient is φ = 15712052848720.

The previous prime is 21604072667017. The next prime is 21604072667081. The reversal of 21604072667045 is 54076627040612.

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

It is not a de Polignac number, because 21604072667045 - 2²⁰ = 21604071618469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21604072666984 and 21604072667002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196400660555 + ... + 196400660664.

It is an arithmetic number, because the mean of its divisors is an integer number (3535211890980).

Almost surely, 2^{21604072667045} is an apocalyptic number.

It is an amenable number.

21604072667045 is a deficient number, since it is larger than the sum of its proper divisors (6677622460795).

21604072667045 is a wasteful number, since it uses less digits than its factorization.

21604072667045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392801321235.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 21604072667045 in words is "twenty-one trillion, six hundred four billion, seventy-two million, six hundred sixty-seven thousand, forty-five".