20486216568 has 32 divisors (see below), whose sum is σ = 51428068560. Its totient is φ = 6800401920.

The previous prime is 20486216561. The next prime is 20486216593. The reversal of 20486216568 is 86561268402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20486216561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1765155 + ... + 1776722.

Almost surely, 2^20486216568 is an apocalyptic number.

It is an amenable number.

20486216568 is an abundant number, since it is smaller than the sum of its proper divisors (30941851992).

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

20486216568 is a wasteful number, since it uses less digits than its factorization.

20486216568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542127 (or 3542123 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 20486216568 in words is "twenty billion, four hundred eighty-six million, two hundred sixteen thousand, five hundred sixty-eight".