20566698145608 has 32 divisors (see below), whose sum is σ = 51809239611360. Its totient is φ = 6803233482240.

The previous prime is 20566698145601. The next prime is 20566698145613. The reversal of 20566698145608 is 80654189666502.

It is a super-2 number, since 2×20566698145608² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20566698145601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3270782185 + ... + 3270788472.

It is an arithmetic number, because the mean of its divisors is an integer number (1619038737855).

Almost surely, 2^{20566698145608} is an apocalyptic number.

It is an amenable number.

20566698145608 is an abundant number, since it is smaller than the sum of its proper divisors (31242541465752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20566698145608 is a wasteful number, since it uses less digits than its factorization.

20566698145608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541570797 (or 6541570793 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 66.

The spelling of 20566698145608 in words is "twenty trillion, five hundred sixty-six billion, six hundred ninety-eight million, one hundred forty-five thousand, six hundred eight".