20564112304645 has 16 divisors (see below), whose sum is σ = 30371612019840. Its totient is φ = 13016405150784.

The previous prime is 20564112304639. The next prime is 20564112304667. The reversal of 20564112304645 is 54640321146502.

It is not a de Polignac number, because 20564112304645 - 2¹¹ = 20564112302597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22597925155 + ... + 22597926064.

It is an arithmetic number, because the mean of its divisors is an integer number (1898225751240).

Almost surely, 2^{20564112304645} is an apocalyptic number.

It is an amenable number.

20564112304645 is a deficient number, since it is larger than the sum of its proper divisors (9807499715195).

20564112304645 is a wasteful number, since it uses less digits than its factorization.

20564112304645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45195851244.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 20564112304645 in words is "twenty trillion, five hundred sixty-four billion, one hundred twelve million, three hundred four thousand, six hundred forty-five".