20027566368 has 144 divisors (see below), whose sum is σ = 58954162176. Its totient is φ = 6442536960.

The previous prime is 20027566297. The next prime is 20027566381. The reversal of 20027566368 is 86366572002.

It is a happy number.

20027566368 is a `hidden beast` number, since 2 + 0 + 0 + 2 + 7 + 5 + 6 + 636 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×20027566368² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3416496 + ... + 3422352.

It is an arithmetic number, because the mean of its divisors is an integer number (409403904).

Almost surely, 2^20027566368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20027566368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29477081088).

20027566368 is an abundant number, since it is smaller than the sum of its proper divisors (38926595808).

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

20027566368 is a wasteful number, since it uses less digits than its factorization.

20027566368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6287 (or 6276 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 20027566368 in words is "twenty billion, twenty-seven million, five hundred sixty-six thousand, three hundred sixty-eight".