20617207155612 has 18 divisors (see below), whose sum is σ = 52115718087888. Its totient is φ = 6872402385192.

The previous prime is 20617207155583. The next prime is 20617207155631. The reversal of 20617207155612 is 21655170271602.

20617207155612 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 7 + 20 + 7 + 1 + 5 + 5 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286350099348 + ... + 286350099419.

Almost surely, 2^{20617207155612} is an apocalyptic number.

It is an amenable number.

20617207155612 is an abundant number, since it is smaller than the sum of its proper divisors (31498510932276).

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

20617207155612 is a wasteful number, since it uses less digits than its factorization.

20617207155612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572700198777 (or 572700198772 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 20617207155612 in words is "twenty trillion, six hundred seventeen billion, two hundred seven million, one hundred fifty-five thousand, six hundred twelve".